I think mine will end up being some kind of retreat or temple. I could also see turning it into some sort of hidden palace. I haven't had any hikers yet. I've only recently sent a few vacationers who were getting to grips with skiing & snowboarding so I haven't gotten to that part yet. I have sent them to the onsen and they've used the vending machines.
So, it's early days for me but unless it's a palace or similar, I probably wouldn't make it residential. I won't put a single family home up there, I don't think.