I've got some software, no idea what it's called, but it's a modified version of an automotive shop invoicing and bookeeping system. My kid put it all together for me as a project for one of his school courses.... Actual cash cost was room, board, tuition, books, fees and upkeep on him for the last 22 years!!!! Hope you can find a nice system at a far more reasonable price!!!!!!!! If you know of any computer savvy kids, they can probably whoop up something for you. Mine also does inventory and manhours, fairly simple unless I let the items to be input get too far behind!!!!!!!!!!