So me and a lot of my friends play airsoft. Recently I have been learning about rebuilding, upgrading, and repairing airsoft guns. I think I can build a business from this. I can offer all the above services and even buy and trade airsoft guns, like buying broken guns and fixing them up with high end parts to make custom guns that sell for a lot more. Anybody with experience in this? What's the profit like? Are you mobile or do you work from home? How do you market? Where do you sell?