I question the high cost of Alclad. A bottle costs eight dollars, versus four for the MM enamel I use. But Alclad is so thin as sold in the bottle, and the secret to the Alclad finish is to put it down very thin (which, being thin itself, allows you to cut paint flow way back). So I only use half as much of the stuff as I do enamel. You do need a good base coat. That does add a bit for paint cost.
But lets face it- the cost of paint for our models is minimal compared to the cost of the kit, and PE and resin upgrade aftermarket (which I find often doubles cost).