Me and my old man use a 10x10 easy up. The one from costco that comes with walls you zip on.
They're pretty heavy duty and not cheap for an easy up at $279, but $279 is pretty cheap for a 10x10 "wall tent"
It's worked fine for us two for a couple of years now. No regrets for a CHEAP solution.
Not promoting it as a great solution, just saying it is cheap and works for us.
We modify one of the walls and stick a piece of plywood on the frame with a hole for the stove pipe. Pretty comfy for 2 guys with the cots arranged in an L shape. We were toasty warm in there when it was -12 out.