Employment of Capital

I went to the car wash with $12.00 with the intention of having my van washed and vacuumed. Yes I knew it was a good probability that there was an abled body to employ to perform the tasks for me. I met Jermaine, he commenced to vacuuming my van. Short dialog he knew a good trade. $5 for the vacuuming he thought a good deal. I walked around in calculated circles and notice some metal on the ground. My new found trade has allowed me to spot a good opportunity to earn some money. So I reached down and picked up some metal, a metal cap to be specific. Then thought hmm and began to look around, and saw a plentiful amount of coins...bottle caps, safety pins, a wrench, shit evern earned $0.04 in the process. As Jermaine cleanded my van, put all the metals I found using my magnet pin. Promptly paid Jermaine $8.

Thought about a magnet bottom vehicle. Besides the picking up the metal, could it provide energy to propel or any other green idea.