You can use proxmox to do most of this. Currently my set will only pass-through the gpu to one VM. I have heard of splitting the power among VMs but I have not gone down that rabbit hole. If I want to play with llms I fire up that server, if I want to game, I shut that down and fire up my windows 10 vm.

When its cold the traps are more likely to dry out. Run some water through the faucets to refill them. Its basically standing water that fills the tube so gasses can not go in and out.

This is what a trap looks like. They are ment to have a small amount of water retained to fill the pipe.

Also running a couple of pichers of water down your basement drain can help if it is coming from there.