The reason I put cheap in there is because one suggestion I've received a few times is to do it using a prototyping board. But those can get expensive and if I end up making, say, 50 of them, it's just not cost effective to buy 50 prototype boards. I assume the cost will be the price of the microcontroller, PCB, a couple of electronic components, and the one-time cost of the chip programmer. Am I missing anything?
As for compensation, like I said, I don't have much. I'm just throwing it out there because I know I'd be hard-pressed to find someone out there to help out of the goodness of their heart. Give me an estimate on the time it would take to get it done and how much you can do it for and I'll see if I can meet your request.