PPG's K -36 and NCP 271 Are High solids and High build primers, I use the 271 as it has metal etching qualities in it.
Its not cheap stuff it doesnt require reducer , Just primer and hardner......I am sorry I dont know the price as I just order it when I need it as I dont see the bill as it goes straight to the office to get a purchase order. I would say from 175-250 bucks for both thats a gallon of primer and 1 quart of hardner.

A gallon of Concept of color should be enough as it will mix to around 6 quarts sprayable. and I would just buy a quart of clear and 8oz of hardner , what catylist are you using ? DU-5, 6 or 7? or DX 61?
for the concept color , make sure the catylist for color and clear are the same as then it will be compatiable to mix together....

SprayTech