This is what's great about this site,you can build how you invision using it
We hate cold more and more, so heading south is our "plan" for the future...nowi just fire up a 1500w heater seal off bedroom or front and wear coveralls and insulated boots to work inside (maybe 4 hrs at a time)...it helps to keep my nose from freezy up snot
...no real need to heat the bus up to toasty.
Now worst comes to worst, life or death? I can stick a small wood stove inside (in out building) and metal flue out window to survive if we lost power for several weeks plus or lost everything that is not paid off
Ours is built light,cheap and with the know, that mud,sand etc and heavy traffic makes a mess (the rubber floor cleans up great)
We fed and had 30+people come into bus,get food and head out (10 or so at a time would be eating standing or sitting inside
I love what your doing! Drive on!