It sucks man, I worked at an apartment complex where people would go visit their families overseas and bring bed bugs back. It's a long process to get rid of them.
Honestly, you shouldn't have to fork the bill legally (at least in my state). You can take legal action or use renter's insurance to help you out. Do what you can to diminish the issue but in the meantime find a better, cleaner place to move to. Wash everything twice. Spray everything. Bed bugs will reside in warm, dark places. Hate to say it, but ditch your mattress and box spring and buy a new one along with protective covers. Pull your rugs up on the corners of the rooms, and look for them. Google is a good source of what to focus on and how to keep it all under control.