>>1964969I actually just did the most budget hot tent. EZ up with a hole in the top, tarps hung around the sides and and 5 gallon propane tank made into a furnace with exhaust piping. Nice and warm in 20-15 (F°) weather. With a few bits free like the propane tank and wood, few bits cheap like the ezup at 40 bucks, and a few bits at the five finger discount rate, you can have indoor heating temps at about 120 bucks for the whole deal..