I think it may sound peculiar to say but my brother lives without any kind of HVAC.
Now it’s not that he is broke and that is why he lives without the HVAC, he lives without an HVAC because he chooses to do so.
It’s not like he lives in a neutral climate where it’s not easily needed for him to have a heating or cooling system, no that is not the case at all, he doesn’t use any kind of heating or cooling system even though he can afford to do so, his reason for not using a heating and cooling system is that he says it is unnatural and he will only use natural ways to heat his home. I wish I was joking when I say that when he says natural ways he wants to have a fire burning in his home and I do not mean a fireplace. He built a makeshift fire pit and set his living room on fire to keep himself warm. Obviously this is easily dangerous and highly stupid to do and it sincerely baffles me that someone could do this. I even offered to buy him a space furnace but he didn’t want one. It gets easily chilly here in the winter time and I always worry about him but he is easily superstitious about heating and cooling systems and thinks there’s nothing great that comes from them and so he refuses to use one. He keeps himself hot by wrapping himself in several layers of blankets and coats.