I am so sorry

Your neighbor's stubbornness would bug the shit out of me

have them pay for it or put a wasp nest in their place

Move or scoop up the bugs and put them back in your neighbors house

At this point, it doesn't seem like they care or want to dissolve the problem using the resources available. It sucks beyond belief, but just now rather than paying for them to get an exterminator, you have to pay for yourself to get one. Nonetheless, it allows you some control of the situation, regardless of how awful it is.

Depending on your area, bed bug infestations may have to be reported to the local government. They definitely have to reported to your apartment manager, who the one actually responsible for handling the situation. You may have legal right to sue your neighbor and make him pay for the extermination and any other damages caused.

At least you don't teach high schoolers.

This has become like a high stakes game of pong now

Simply can't treat one and not the other.....I would be moving... Instantly

And once they stop using the fogger, the bed bugs will go back to them. Though I highly recommend you getting an exterminator for your condo and scheduling checks with the exterminator for the next few months. Bed bugs can crawl into baseboards and hibernate for months.