GD,
I suggest going around the "hood" asking the neighbors if you could wash their cars for them (for $$$ of course). Then start offering extras such as wax, interior, dress tires, etc. for more $$$. Don't classify yourself as a mobile detailer and you won't give the perception that you HAVE professional experience. You probably have enough neighbors to keep you busy all summer. Some are sitting in front of the TV, right now, drinking a cold one that wouldn't care if you used a PC, Zaino, SG, BF, BS, MF, clay, etc, etc, etc.
I think if you buy some consumer products, do good job, build a reputation for yourself, you could make some decent cash this summer. Hell, I started cutting grass at 12 and bought my first car (70 Fastback Mustang) with the money I saved over the summers. I targeted the neighbors who weren't so picky and just wanted it done no matter what. Why not wash ("detail") cars...get some experience...buy better products/equipment...next thing ya know your rich!!!