JAde -

seems like we are like-minded - check my today's thread here:

http://www.zen-cart.com/forum/showthread.php?t=129269

BAsically laying out the same idea as yours.

Did you get a chance to find a solution to it? VERY CURIOUS!

I also thought of adding the Dual Pricing mod to my store, this way assigning a retail/wholesale pricing per customer and tweak this to suit our needs -

Cheers!
Gabstero