Good question, low low volume, It's not my full time job (sales/accounting), I am planning on building these by hand one at a time after I finish my regular jobs and family time. I am going to put the third or fourth one on EBAY and see what happens, if the buyer likes it I will keep building them.
I picked FPGAs to put that on my resume someday and because I did my thesis using Altera 5064 FPGAs for a car alarm a long time ago. I have done some reading on PIC chips and find they might fit some other projects I have drawn in my notebook.
The GPS chip part, I was planning to measure distance to target within 25foot intervals, so you can balance team strength. Lets say the attacking team has better shooters then the defending team, force them to get within 50 feet to fire. If the opposite is true let them shoot from 200feet.
Mucho Mucho thanks for having this discussion with me, I have no resources around me to draw on since my career is in other fields. I can probably ask you a million questions.
Frank is right, power was a small speedbump on the project and I am ready to move onto next challenge.