Labor and install is a wash on all this when you do it yourself, lol.You can build them up for as low as 2500 to as high as 4k. Then you have to spend money on Tuning, then labor to install.
By building them, does that mean add ons like reseviors etc? What options did you get on yours?
Did you go though King and then pay someone else to tune them?
Sorry for all the questions, but this is a setup I've considered and would love real world info. Monty power was the only person I've found that discussed running them.