Don't let the tenants control the situation. You need to ask the PM how best to move them along. If the PM is not on your side get a new PM. If they behind in rent can't they be sent a letter of eviction?
Don't throw away $30K due to emotions. I think you are being driven far too much by emotions and too little by the best financial outcome.
I know its frustrating but its time to be well advised and make well thought out decisions or it will be very costly.
The OP stated a while ago that they were now current with the rent