I totally get that this isn't the point - but if Sealy isn't going to fix it and the mom doesn't cough up the money, (cuz, honestly, with only a couple more days till you close... why would she?) You could try a patch. I don't know if you can sew, but it's what I would try. Go to a fabric store and buy the smallest piece of upholstery fabric you can (maybe 1/4 yd) and make a patch. Tell the person at the store what you need, they might be able to help you. You are right, darning isn't an option, but a patch might work.

But seriously! To strip the bed and spend that much time doing that much damage, that's not normal. I don't think that's a phase. He's doing this stuff at home too. Gotta be! Good luck.