I've been trying to come up with a wholesale solution for my site as well.
I've tried making an unlinked page with forms, but it doesn't allow for easy product selection or price calculations
I've also tried making an unlinked product page, with discount codes, but it doesn't allow me to unlink the shipping for this separate page (or maybe I can?) Shipping for volume is different from retail, and often retailers have their own shipping accounts that they prefer to use.
Any additional suggestions?