a large scale printing idea

Have an idea to start up a company ...wel not exactly but like a store which is exclusive for printing construction drawing which includes all cadd drawing , interior drawin , detail drawin etc all size sheet from A0 to A4 , color , black n white n glossy paper etc... the store is controlled by a software which handles cost for d no of prints , sheet description, tax , n also to provide bills to customer .. even printing by gettin orders from mail...so group of my frnd hav to come up to start up by imposing d idea to make it a large scale printing idea......