and I can't figure out how to do it. Please, please help!

Here's the pricing I need to be able to do:

-regular retail price for general customers
-10% discount for all member customers (those who have paid for a site subscription)
-wholesale pricing that has two discount levels. the first is 40% off retail when they buy less than 5 of an item. the second is 45% off retail when they buy 6 or more of the item.
there are no quantity discounts for retail customers, ONLY for the wholesale (who have the two tier quantity discount pricing)

So, is it possible to do this? I thought about just doing group pricing., but the wholesale customers might be in the 40% category for one order, and then the 45% for the next. PLease, if anyone has any suggestions on this, I'm all ears (or, if anyone is up to working on it for me I am willing to pay for it!!!)