Paint question

My dilemma is cost. I used PPG Concept on my last paint job and have about 2 quarts of color left, no reducer no catalyst. Also I have one unopened quart of sealer/cat. and one unopened quart of clear. I want to paint my current build the same color as my Barracuda using the same system. Jam everything straight single stage, seal the exterior and three coats of straight Concept color and three additional coats of 50/50 color/clear. The catalyst is $400/quart and I need to buy 1.25 quarts of cat + reducer. The mix is 4-1-1. I would need one more quart of clear and two more quarts of color so the shop is quoting me quite a total. They want me to paint base/clear but I am reluctant to use a different/cheaper product. Just about over the sticker shock and will order the Concept. I am trying to come up with how much color it would take to jam the entire car (1 quart) and if I can get there with three additional quarts of color. This build is a much higher level than the Barracuda was so I don't want to cheap out now after all the money already invested. The color is a custom red on the car in my avatar photo. Thanks for reading.