I would check the rescues adoption criteria first. Some of them want to see the set-up first before they adopt out. If they require a cage type enclosure, I would recommend something like a 3 X 2 x 1 pvc or melamine enclosure.
Yea I emailed them to ask what they require. The ad says they will do a home inspection so I asked what they look for. I explained that I already have one BP that I have in a tub setup.