Minimum qty pricing for dealers, distributors, retailers in one item

We are trying to set up minimum qty pricing for both retail business and  wholesale business. I saw the “minimum quantity” field in a subtab. But the value in this field it will affect the normal retail shoppers. For example, if we set up the “minimum quantity” of 3 pcs, no retailer shopper can buy 1pc.

There is no way in Netsuite to set up the pricing levels for retail price, distributors price and dealers price in ONE item. It seems that we have to set up multiple items (item with retail pricing level, item with distributor pricing level, item with dealer pricing level) to show minimum pricing for each item. This is very hard to manage.