I used to mow lawns. $20 each and I'd do 3-4 a week. That was back in the mid '80's so you might be able to get more now. A lot of people around my house used to have horses so my friend and I would go around cleaning horse stalls in the summer. Yeah, shoveling shit sucked but we were outside, stoned, and happy so wtf. Once i turned 16 I got a real job at Baskin Robbins.