Can't the kid do it on his own? Why does he need a trainer? Have some will power
I mean, if someone puts a cheeseburger in front of you and you're full, don't eat it. Money obviously isn't a issue though so I guess it's alright. I'd do it. More than making $500 minimum, you're doing something really nice for your cousin that obviously means a lot to him. It may seem crazy to you but I mean he's willing to pay his cousin, so it must be important to him. I would hope that if I ever needed help my cousin would do it free of charge. It all depends on how much you want to commit.