I shot my first wedding for a friend this summer, same situation as your first wedding was, money issues, so I volunteered. It was a very small wedding, with divorced parents that didnt get along. My group shots weren't the best. Reception was in a small room, so for the cake cutting to have an audiance the bride and groom were pretty much backed against the wall, with a long table infront of them. No good angle. In the end after PP work was all done and I gave them the shots, they were so ecited about how great the shots were and that I am so talented yadda yadda. Im sure they will love them. Also being a mechanic for 9 years i know what it is like to work a whole day for crap-pay. gotta love the family's broken stuff. If they insist you take the money dont hesitate lol.