ok so below is some width and height measurements for wall spaces..you will see numerous red lines and measurements are from one red line to the other...ok here we go

jack n jill bath ...38" wide above light switch

girl n boy bedroom ..measurements the same for both
left to right...from window to smaller window under a/c 55"
window to window 78" wide
right window crnr to light switch 38" wide

this would be first wall you see when entering through frnt door...width from switch to door 92"
with a variety of height as there is a slant in the roof there going down stairs to garage

left crnr to upper right before it drops to lower stair we have 3'
with about 46" in height to play with between stair rise heights

under the light therefrom crnr to crnr is 59" wide
under light to stair platform about 5 1/2 ft

total width from crnr to crnr is 7'...window crnr to the light there is 40" wide

from utility closet to door its 89" wide total..
between upper lights you have 52" in width

left to right..door to window is 48" wide
right of window to fridge wall BEFORE it steps down 41" wide..you have more room here as the wall drops down a step as you can see

right side of door 24" wide with 5 1/2 ft to play between light and floor height..but now i think about it and there is going to be hand rail there so that distance is shrtr
left side..29"wide...between upper light and bottom switch you have 42"

Above toilet vanity to crnr by window is 32" wide
crnr to crnr under window is 44"
big wall where door would swnig you have 77" from window crnr to door opening

Above desk you have crnr to crnr is 94"wide..window just itself is 80"

Stub out wall when you first enter bedroom 28" wide

right to left..window to slider is 43"wide
slider to bath door 39"wide but you have light above and switch to right ..i forgot to get that in between distance,,will get it

Farrar bath..above toilet you have 32" wide from vanity crnr to window crnr

Wall bath above and around toilet...behind toilet 34"
looking at photo left side wall same 34"
was gonna put tp holder on the right wall in this photo..but when sitting down would be on your left unless you prefer different

Wall master:right to left....switches by door to bath door 65" wide with 5 1/2ft of height to play with...bath room door to slider 39" wide
slider to window 44" wide

Wall Master bed room starting right to left..From right crnr to window 56" wide.
left of window to closet 33" wide
stub out wall when you first walk in 28" wide