The K16 board will cost anyone about $65 if they want to go to Digikey and Mouser to buy all the parts themselves. Good luck soldering in those 325+ parts.
Its doable for anyone with 1. experience and 2. Patience I don't think it would be much for someone to build one or to, but if you are building 20, 30, 40+ Id except you have the sense and cash to pay for a assembly company to do it for you.