Good luck with the new business.
I wonder if you are under estimating the cost of manufacturing for small production run items. It is one thing to sell an already manufacturered cheap BB at a markup, it is another to find someone who will make you 26tpi cups for them. If you need thousands then the price per cup will probably be cheap, but if you only need 100 then it is going to be pretty expensive.
Pass and Stow makes a porteur rack that can carry panniers:
http://alexandchristine.smugmug.com/...YRLe#252366034
You can see an example of the cost issue by looking at the prices of the small production run Velo Orange or Pass and Stow racks vs the cost of high production run Nitto or Tubus racks. A Nitto M12 costs around $50us, the equivelent Velo Orange is $110us.
alex