wow... do overs (and must do's)... um..... where to start...
A/c right from the beginning.
Fantastic fans and a/c.... not pull the fans and drop a/c in. I was being lazy and I pay for it every time we just need air movement and not a/c.
2 more windows up front.
I know I'll catch flack for this but.... screw the insulation. Unless you are going to spray foam the **** out of it dont bother. We live in a metal tube with single pane windows. Its a damn heat sink. Just over power it....... lots of btu's. Wood burner and a metric ton of a/c. Or follow the nice weather.
tile floor throughout. Our tile bathroom floor, counter tops and back splash has held up just fine over the last 10k miles. I was afraid she would rattle to pieces but that has not happened yet. The bathroom floor is solid as a rock.
Compost toilet. Screw black tanks. Im so over it.
Metal studs.... oh baby... not a do over... but a must do. For anyone contemplating metal studs. Do it! So nice.
Don't glue down the carpet....I was such a dumbass. Tack strip and stretch it in. Or forgo carpet all together. See above tile floor recommendation.
Another item I'll catch flack.... don't pull the plywood floor. Buy a west coast bus. You'll perish or get board with the skoolie long before she rusts through. And if she rusts in half... buy another skoolie for $2500. Just build on the factory floor. I added 2" rigid foam and another 3/4 t&g floor.... that was stupid. I'm 6 foot and could really use that extra 2.75 inches of headroom. I pay for it every time I stand up. Oops.
If you go "airstream" style with the over head cabinets like we did... make them a bit bigger. I was afraid if I made them to big they would impact the "head space" of everyday living. That does not seem to be the case. In fact quite the opposite. That area is really just unused space. Use it up.
My number 1 do over.... make the couch behind the drivers seat 5' instead of 6'. I can't move the drivers captain chair back far enough to be 100% comfortable. Big oops.
That was fun... almost therapeutic.