I've never been one to shy away from very much, but I don't think I would
get any sleep with one of those things running in that little space. I
would worry about the obvious open flame, not to mention the combustion
gases, no matter how blue the flame. My better senses (not that I've ever
been accused of having any) tell me to do the wheel & tire upgrade later
and install a good, safe heater first.
As far as the pot, that's for smoking, not for keeping you warm!
Good luck, you'll need it,
Miguel