A wonderful post.
Truely amazing.
Clearly you didnt read it, nor understand how most A/C systems work. A/C's shut off upon WOT or at given rpms, and no matter what car you drive that has a A/C system, that pulley will always be there so when its off how is the drag any different.
And as said before, its not worth the cost on a vehicle like ours nor on many cars. If you have the money to burn, but it or just go turbo.