Dad-79 & mom is 77 - live in Florida. They need affordable, handicap accessible housing. They owe more than the motor home is worth. The bathroom floor is spongy and the toilet leaks. Not safe for them to live there anymore. Plan to move them back to Michigan, but need options in Florida until he gets his prosthesis.
When defaulting on the RV, the creditor will most likely want to pick it up (just like a repossessed car) and the RV park owners/managers will want it gone too.
After the creditors have possession of it, expect them to try to recover the outstanding balance plus charges an interest etc. Depending on dads financial status, you may need to consult an attorney regarding bankruptcy. I believe no one but a taxing authority (such as the IRS) can attach unearned income (you'll need to verify that, don't take my word for it), if your father only has Social Security and/or pension, bankruptcies cost money to do and it may not be worth it. Legal advice may become a necessity.
If that is the case, and it is an RV you're talking about, then what he would be doing is walking away from payments on a vehicle. What are the implications to his credit standing? Does his credit score matter any longer at his age? It sounds as if he's got some fairly substantial medical issues since he's had his leg amputated (cancer, diabetes?).
In whatever is his monthly financial status, would he be going into private pay AL or a MediCARE/MedicAID nursing home? Or maybe and income qualified HUD or section 8 unit. So, be aware for assisted living, even HUD or section 8, they can and often do you check a person's credit report and they can refuse residency if they want to with no governmental repercussions. If you're wanting to relocate your dad do a private pay place, you may want to do it before you notify any creditors that he will be walking away from the RV payments