There are air conditioners, just those loose cabinets that you put in a room. Some also work as heating. The only disadvantage is that there is a container in it that you have to empty because water gets in there. Isn't something like that for sale? It might make a difference for your room and you don't have to set the setting very high, that is even undesirable. I think it is better if you buy the mattress first because the house takes longer to get ready and it is important that after all those years your body can rest and recover more. That old mattress won't correct anything now. By the way, I also bought a different mattress, I would have preferred my grandma's old-fashioned one filled with sea grass. This one is also foam and not that good but it is better than the old one. We are told that you should buy a new mattress every 5 years but I don't think this one will last that long.