I'd get rid of everything green. The ceiling is so pretty, I think you would make the most of it with a nice neutral, maybe weathered gray tile -- this one is like $2/sf from Lowes:

Nicer faucet, and you're done for a couple hundred overall, and you're wide open on shower curtain and any other accent colors you might like.

this was a complete makeover for less than a 1K. it started as a builder basic. the flooring is vinyl. she made the vanity. your wood ceiling would be a great compliment to this.

look at a craigslist for vanity, remnant granite tops, left over flooring, etc.

http://eastcoastcreativeblog.com/2015/09/bathroom-makeover-blogger-vs-builder-grade.html

if you go to the link and look at he before, it's hard to believe what she did.

this was the other one (there were 3 makeovers in this challenge)

https://www.overstock.com/Home-Garden/Ready2HangArt-Painted-Petals-XII-Canvas-Wall-Art/9811209/product.html?refccid=SFK2ZKNB2ZB3YYSGF6YBICWMXY&searchidx=100

If you paint the window wall a soft light gray, the view outside the window will pop and provide the visual sensation of being in a larger space. Paint the window too. Cut it in the edges at intersecting walls and ceiling neatly and leave the shower wall the same white as the ceiling.

you may have some water issues when you pull up the flooring.

look into getting the shower/tub sprayed. cost-400 or so.

paint the vanity white black or dark gray.

look for a new vanity top. or as I mention, look on craigslist for a new vanity. comes w/top, sink and sometimes a faucet.

Can you swing 1-2K for this redo? if not, paint the vanity, replace the top, get new flooring (again, craigslist is a great find of left over tile that people are trying to unload). paint the walls a soft blue or sage to go w/the cream. no gray.

perfect. then just be on the hunt for materials. getting your shower sprayed will make a nice difference until you have saved enough to redo it. finding white toilets (also on craigslist) can be done for $50. They're perfectly fine. clean. people just upgrade all the time.

so doing that, getting the shower sprayed, the vanity painted, all white, will look great with whatever color you decide. love your wood ceiling. maybe to a tung oil on it to give protection from moisture and deepen the natural hue

what big city are you near?

i would leave the inner wood. any casing around window/door, I would paint.

Paint out the whole window - sash, frame and trim - to the same wall color. It should disappear so the outside can come in. Baseboard should match the color of the wall it is nailed to.

Pine door into the bath is fine.

ok. so looking a CL, there is a guy in Eagan who has tons of granite remnants. your husband could prob cut them to fit.

this vanity is for sale for 400. guy(in Hibbing) has had it up for over the month. prob offer 250 cash. vanity, sink and top.

Hermantown,,,vanity tops 33" quartz

28" top,,,200

white toilets abound, nearby you, for 20-50 bucks.

this guy is selling granite tile. enough for you to do a countertop and your floor,$100. (always barter)

this guy (Two Harbors) has 20sq ft left of this wood look tile for $40 (i'd offer 25). you can prob find out where he got it and purchase another box to do your floor.

these are cheap alternatives for you to upgrade your bathroom for pennies.

I'm a CL master! You can't believe the items I've found for bathrooms I've redone (for flips and stuff). out my way L.A., there are 20 pages of items so I'm spoiled.

you would search, 'vanity', 'bathroom vanity', tile, flooring, granite, toilet, sink, etc,,,then off on the left side, un-check non-relative sellers (like autos, boats, baby items, etc). you want household items, general items, furniture, garage sale,,,etc.

https://duluth.craigslist.org/search/sss?query=bathroom+vanity&excats=69-24-1-30-8-13-1-14-8-8-10-2-5-1&sort=rel&hasPic=1

https://duluth.craigslist.org/search/sss?query=tile&excats=69-24-1-30-8-13-1-14-8-8-10-2-5-1&sort=rel&hasPic=1