Wow, Damien....that really sucks. I'm not usually one for breaking rules, but there are some exceptions and if I found myself in your shoes, I would probably try to hide them. If hiding two enclosures isn't feasible, then I would keep Jojo and just hide him. And while they are in hiding, I would be working very hard to save up the money to get out of the lease and get a new apt/house where hiding would not be necessary.

If I didn't have room to hide two full-size enclosures, here is a plan that comes to mind: I would minimize the stuff they have in their tanks to the basics of newspaper substrate, water dish and hides. Then, if something comes up where management must go into your apt to repair or whatever...I would move the snakes into small rubbermaids that can be slipped under the bed (or wherever) and empty out the tanks so that it looks like nothing is living in them. After the "invasion" you could put them back into their homes. Even if they had to spend the day under the bed while you were at work or something, it shouldn't hurt them. And again....I would be saving as fast and hard as I could to get out of that apt.