Once the Units are Connected they can be Installed and removed as easy as one unit, "just a little Heavier". Done in my personal home without the cabinets above.

But how would you make sure your duct wasn't twisted? Would you just need really long supply lines?

In a remodel/new build, if on an outside wall, provide access panel in adjacent cabinet, or back to a closet or other space where an access panel may be installed.

We are currently remodeling our laundry space and our washer/dryer is on an exterior wall. For an access in a cabinet, would you do it in the upper cabinets above the laundry sink? I attached a picture of the location. Our remodel is still very much in progress.

Where do you need access? Will you have a full height panel dividing the washer/dryer and your cabinets like your picture above?

I would love the panel ideally. I think it makes it look more finished. The vent and connecting point for the supply lines and drainage is about level with the top of the washer.

That location is typical and creates the problem. Access needs to be where the counter top is.

Your cabinetmaker, or a skilled installer could fabricate an almost hidden access panel in the side panel.

If you washer and dryer is like mine, it doesn't go all the way back to the wall - there is about a 3-4" space for the hoses, dryer vent. Having the access panel above the units is not very practical. How are you going to get down to the hoses/plugs etc near the bottom.

what I think would work would be to have the side panel made in two pieces. The front panel fixed and the back panel removable so you could unscrew and remove to get floor to ceiling access. What are you doing on the right hand side of the space.

It is still up in the air, but I'm thinking a base cabinet with a deep sink with standard wall cabinets above. Nothing especially fancy. I just like cabinets because the doors hide everything and it makes it look cleaner. I'd be open to suggestions on what to do there, but that's what I had in mind. Probably white cabinets.

The first thing is to make sure the units you buy can be stacked, I have Bosch that can't be but I have my laundry in a space with cabinets above and on both sides but the units just sit side by side and I have folding doors across the whole space.

They move in and out like any other appliance, except a lot heavier, so if you have a vinyl floor, you may want to slip thin plywood or something under the feet.
Check this out as a solution for crushed dryer hoses: http://www.dryerbox.com/

My Bosch washer/dryer is 29" D & 25" W, its stacked 72"H, now I just need a cabinet that is 33.5" D x 37.5" W and 80 - 91" H with a doors would work for me. Do I need a handy-person or custom cabinetry...would a refrigerator sized cabinet do the trick?