Customer osCommerce Modification

First of all, I need this project complete in around 3 days max. Please do not bid if it is not within your time range. What I am creating is a complete copy of an oscommerce site but for wholesale. I would like a contribution that when I add/edit products I can set a minimum to purchase amount. For example, 3 shirts, but then they can also go up to 4, 5, 6, 7 up to the stock amount. But they have to purchase at least 3. This value should be easily edited when adding/editing products. Next for some pieces of clothing, we would like to sell in wholesale of packs including different sizes. Example, one set could include a Small, Medium, Large, Extra Large. I don't know how we would program this, maybe to have it one product and add in the description that the pack includes the 4 sizes or whatever it may be. Not to sure. May need some help on that one as well. The deadline for this project is very soon around 3 or 4 days max and we are getting more and more wholesale orders come in and our current site cannot provide for them. Thanks