I dont get why the parents dont just move and leave him there. Would save lots of court costs and really simplify things.
Also, back the 30 years or so ago that the parents moved in, it was probably the best place they could afford. Now, with 30 odd years under their belts, they could move somewhere really cool and totally live it up
Stupid selfish ignorant parents just wanting things all their own way, with no thought for their son. It IS after all, HIS HOME... He didn't ask to be born did he?