not saying you should do it but...a guy at the bolerama last weekend had a woodstove setup inside his
cadet trailer not the necest setup i've seen but it worked!
i would seek electricity for sure.
i have the foam tiles into mine as flooring and its very effective, i plan on lining all undercompatement with the same tiles and add reflectix everywhere i can inside the wall.
also dont forget to put something over the
fridge vents, lots of air coming in from there.