what precautions do you guys take when keeping different species?

I have a couple of ball pythons and was thinking of getting a red tail Boa.

I've been reading about quarantine procedures and how boa's may contain diseases that aren't harmful to them, but fatal to ball pythons.

I'll only have one room available to keep the snakes, what would you guys recommend?
I could possibly keep the new one at my brothers house for the quarantine time, but I wanted some feedback on housing different species together(same room, not in same tank) longterm.