And sadly the OP and his father has to take the rap for it as they own and are responsible for everything that happens. EVEN if he gets a lawyer to make waivers there is still a way around an a loop hole that another better lawyer can gain from to sue them and take it all .

LOOK at WAL-MART they get sued everyday over stupid crap that the lawyers didn't make into their policy but yet WAL-MART has to settle .If you want to protect yourself and your dad please throw this into the toilet and flush it like it needs to be .