Also speaking from personal experience, yes, if you start collecting isopods you end up with a wall of containers. We used to live in a basement where we could have tanks to our hearts content and alongside 1500 gallons of aquariums we had 8 tubs for isopods if memory serves me correctly.
Don’t assume that. You have no idea how many unintentional wonderful isopod habitats exist on your property. Rather than building a terrarium, you can encourage them to come to your garden. !fucklawns