If you put together a complete kit /w custom manifold, downpipe, new turbo, intercooler and piping, and all necessary fittings, lines, and fuel upgrades for under $3,000 I will be the first person in line to send you a check.
Lets please not turn this into a piss-fight. First off, you need to go about this more professionally. Dont include your personal prices, just tell us exactly what will be included in the sales and the final price. If you produce a turbo kit for $700-1000 less than chimp, you WILL have buys.
Go sit down with this friend of yours, call around, get ALL prices for everything. You need to include EVERYTHING if you are going to call this a complete kit. Mainly, you will need to do this exact kit on a personal vehicle. Take lots of pictures and even make a write-up for directions to be shipped with your kit. This way, you will not overlook ANY of the little things necessary to put the kit together. Instead of just saying, well, you need a turbo, exhaust, manifold, and intercooler...