Warehouse Style Website with inventory control

Hello, I'm looking to create a new "warehouse" style website, with inventory control and stock level update control, with password enabled options, so customers who go to the website will need to be given a username and password. From here we will add stock with pictures, it will have the current count of stock levels we have, as stock is purchased by customers, it will automatically reduce the stock levels down, once all stock of one product is at zero, it will show the product as "out of stock". As we will be selling a large number of different products with limited levels of stock, the user interface for the website administrator will need to be user friendly and easy to add pictures of new stock and stock levels. This website does not need to be written in "adobe flash", as some of our customers use IPADS, which do not support "adobe flash" enabled sites. On this project, we would like to build up a business relationship, so we would get the designer to design other sites in the future, which we have idea's for in 2011. Thanks for your time.