The last thing you want is an eviction on your record. Once they file in court it will show on your record, making renting a quality place to live extremely hard.
I'm guessing her husband works under the table at a shady shop. It's going to be hard to collect anything from this place. Time to look for a new job. He would double his take home pay working at McDonald's for heavens sake.
I believe he can apply to the VA to have his discharge status upgraded after a certain amount of time passes. I don't know how successful he will be though given his record. Good luck.