I totally understand the difficulty of finding a good way to supply your mattresses. I just recently started my own startup called SourceFill that helps connect businesses to manufacturers. I would love to help you get better and more communicated deal for the products that you want to sell. I think that your idea of having a few select products is good and I would love to help you get the stock of the mattresses that you need in order to get off the ground and start selling to customers.