Looks very good.:). Ask the guys what do they need, and then try to find it for them. Soon you will need a bigger van. :beer: . [ I'am building a 40 footer:) ]
Your best sellers will be the tools that get consumed like Hook and pick sets,Screwdrivers, Hex keys and sockets, pliers that sort of thing.
Good luck, I know that you are on the right track,you are also very right about pay day:)