Would it be a possibility for donating members to be able to manage more than one prisoner?

I think that would be a neat feature, obviously with all of the same-IP restrictions in place but having the resepected player advantages across the board for how ever many prisoners Mufasa decided to have as the limit.  Personally, I propose no more than 3 as the limit.

That would be easily abused. an extra $5 isn't worth adding to a potential screwup of the game

Abused in what way?  It would be no different than creating another account and donating on both?  Would just be easier than switching to the other one.

Just think it would be a nice option to have when you get incarcerated for 20+ mins - switch to a different prisoner and play with them for a bit.