If each spiders paid 0.1% of rent and utilities how many spiders would you let in?
The kind of spiders is based on the species you most commonly find in your living space now. Each spider will have its own personality but, will largely behave a normal spiders in a environment they feel safe, with that said if for example you let it get to cold there will do something about it.
I probably already have a thousand spiders in my house anyway so I'll gladly take the cash for being their roommate. Maybe 999 so they don't get pissed that I'm freeloading.