Well to start with that's illegal-no more needs to be said. You better hope no SERM guys read your post. SO i guess NOOOOOO is the answer-money isn't everything sunshine.
Thats easy ACS. If you already told your dad you'd help him, you gave him your word. I know your dad will let you out of the deal with no hard feelings but you need to practice doing what you say. We all do. The buck is your dads.
Regards of law there is something to be said that your family and your word are priceless commodities that should never be comprimised for financial gain..