“It may just be that as master you are the only alpha. But with a new master - perhaps he will recognize them as the new alpha if you are gone?”
I think he would recognize a new master as Alpha fairly quickly. He’s a very smart dog and I think he’d figure out not to bite the hand that feeds him absent several meals from “mom.” He knows that the few weeks my husband is home he is the Alpha, but like My Big Fat Greek Wedding- “The men may be the head of the house but the women are the neck and they can turn the head anyway they want.” He’ll obey dad, but he knows who the neck is, and he knows he’s in a world of hurt because “mom” nearly always defers to dad and God help him when I do. My dog very well knows his order in the pack- kind of a “wait till your father gets home” scenario.
It sounds like a few Freepers have offered to talk to you about giving your dog a good home. I hope one of them works out.