Been seriously thinking along these lines ourselves too.
We now have 6 snakes and they don't take too much looking after.
I think there is an issue of scale here (no pun intended!
) - we have been offered rescues because people know we are into snakes. If you take on one snake that would otherwise have no future you have a reptile rescue centre!
Right about the medication though. The last one we took on cost us roughly twice what the snake was worth in vet fees and antibiotics. We figure we saved a stunning boa, but it was certainly not a financially viable decision!
We've been thinking of approaching local wildlife centres (in the UK) with a view to setting up a reptile area - they would gain from the exotics and we would gain from their existing visitors.
Anyone out there done anything similar?