I prefer to deter as well, that's why I use dogs instead of traps and guns, but a 50lb raccoon, hanging around the house, that sucker would have to go bye bye. I think you should get your trapper friend over there ASAP, before you, your pets or neighbors get hurt.
I can't even envision the size trap that would be needed. I have a small one that can be used for cats and regular size raccoons but not fatso. We laughed when we looked at the trap. I don't even think it's head could fit..lol