/u/18k_gold on Offered to photograph my cousin's engagement party as a gift. She accepted, then sent me a 47-point shot list and a mood board with 200 pins.

Wait 5 sec.

You need to tell her now that there is no way possible you can do most of the stuff on her list. If she wants a professional instead, you will completely understand. In fact you recommend her getting a professional. If she chooses to stay with you, you will just go around and snap some pics and send them to her. She can pick the ones she likes and print them out on her own. Don't bring a gift.