I found this Koehler shower that I like. Maybe do these walls and a cut pebble base for interest? I even like the safety bar/shelves.

Solid surface is the best material for showers, particularly for a rental. Let them get their looks and feel elsewhere, please.

Did you look at the colors that Swanstone is offering? Their Mountain Haze is rustic.

You can get Swanstone in individual sheets that you cut to fit each wall, or in some shower kits with base and walls. Mountain Haze is available in bathroom products only.

Swanstone Shower Walls - with where-to-buy lookup

Transolid has colors called Sand Mountain

and Silver Mocha

that are both a bit rustic looking. My inks take you to their site. You will need to do a search there for where to buy, since the place I bought my Transolid shower online is out of everything! Transolid can send you samples of their materials. Swanstone can, too, but you can find a showroom that carries them in larger cities. Even the showrooms that I know carry Swanstone do not have it on display. You may have to ask to see the samples.

The pictures I have seen of the Kohler Choreograph in that sedimentary rock look make it look beautiful, I agree. Check and see if it is available, though. They were changing something and had no or very slow delivery of the product this winter and spring, I have read. Did you see the "Kohler Choreograph?" thread?

Joseph, thanks! You are right, I can add rustic interest in other ways that don’t create work for me going forward!

Nancy, those are great options. I didn’t realize there were so many more options. I haven’t done any bathroom renovations in a few years so am obviously way behind! So you have Transolid installed? Would love to see pics.

Here is Nancy In Mich's bathroom reveal thread:

https://www.houzz.com/discussions/5437746/bathroom-reveal-ada-shower-with-custom-vanity-in-small-bathroom

Whatever you decide on seal the surfaces really well with Impregnator 511 available at your local home improvement store. Apply generously, especially in wet areas. I used 3 coats letting each dry 24 hours. Google it and you'll see why it's popular.

Don't seal a solid surface, though.

Yes, there are many, many options now. The term solid surface is a special one, indicating that the surface can be sanded or buffed to remove any scratches or scuffs. But beware that some companies, like The Onyx Collection, will use the term inappropriately when they have a gel coating on the surface that means that the material is NOT the same all the way through, as Corian, Swanstone, Transolid, and others are. Marbleite is another gel-coated surface. Ask if the material can be sanded or buffed and that will tell you if it is a true solid surface. A craftsman like Joseph Corlett can even come in and repair some things that cannot be sanded or buffed on a soiid surface, like chips.

When you are looking for your shower kit, if you are stuck because you cannot find a shower base in the size you need, there are places that will do a custom base for you. Expensive, but worth it if you really need a custom size. Grifform.com is the company I got a quote from, in Oregon or Washington.

If you are looking at Swanstone, you are likely never going to see it in person, except maybe one shower in a Kitchen and Bath showroom. It is best to study the Swanstone site and figure out what is available, and what you need (including model numbers) before you go to the showroom. That is because they sell so few of these at many places that they may not know enough to help you. But if you have the model numbers with you they will be able to price it out for you. I was looking at a Swanstone base and walls for years while I waited for my contractor to be free. I went to three different places to price it and no one could find the handicapped shower base Swanstone sells, unless they looked it up with my model numbers. I ended up with Transolid because Swanstone's base was only 32" x 60" and I could not see how a wheelchair could be turned in that space. I found Transolid through a YouTube video. Their base was 37.75" x 63" without the ccustom price of Grifform

Solid surface is not cheap, but when you consider that you do not have to do the preslope, waterproofing, leak-proof testing, and such, it may even out with tile in the end. It is infinitely more easy to care for. We have had ours almost a year. I squeegee after most showers and twice I have cleaned the shower floor due to pink slime forming in the trench and in the cracks where Transolid has carved out a grid of lines to make the floor slip-free. I can't use smelly cleansers due to having asthma, so I bought the Force of Nature e-water kit, and I make up a batch of electrolyzed water and just spray it on the floor and trench, then scrub with a brush 15 minutes later, rinse, and I am done. This Force of Nature kit is making cleaning so easy. I even use the e-water to spray on the floors to mop them. It physically breaks the walls of the cells of any organism, so kills mold, mildew, germs....whatever, yet is safe on the skin and only has a mild chlorine smell.

I'm doing two bathrooms in Coachella Valley (Palm Springs area), also for AirBnB, but my area is the opposite of mountain cabin, as MCM is the popular style there - or Spanish Colonial. We have nice mountain views, and the mountains are close, but the valley is low and hot.

I plan to use 24"x24" tiles on the walls instead of solid, and so there will be very little grout needed on the walls. I also want to have pebble floors, just because I like them, but I was going to use whole pebbles instead of cut ones.

Nancy, your space looks wonderful. I will probably end up with a custom base as I’m trying to make the shower a bit bigger. I don’t have asthma but I am sensitive to many cleaners so will look into the cleaning kit you mentioned.

Lars, I’m not eliminating pebble floors yet, as I really like them, too. I don’t mind a bit of extra cleaning time. I did read though that a lot of people find standing on the whole pebbles uncomfortable which is why I switched my plan to cut. It was one of those things that people mentioned that would affect their reviews.

I may do the whole pebbles in my shower as I’m pretty sure I will like the feel. I love walking barefoot on my bumpy seagrass rugs, so I think it will be similar on the pebble shower floor.

This is a shower pic I absolutely love,

I would never do whole pebbles on a shower floor because, as you age, you lose fat in the pads on the bottom of your feet. What might be OK or even feel kinda' cool for a 20 something would be quite uncomfortable for an older person.