Build a shed quoting and drawing program

We are wanting a shed design software that is a complete business solution that includes sales reporting, client payment details, email integration and an automated ordering process. It needs to have an inbuilt engineering program function that can custom design every building to suit the site and other client specifications in real time - with computational analysis data. This then generates an instant costing and bill of materials for the structure - ready to send and order from our suppliers. Client quotations, orders, engineering plans and job elevations are all instantly available to print, fax or email as a PDF document. Client job tracking, system enquiries, lead sources and other functions are also needed Three dimensional viewing of every job and walk through of the building is needed on the fly to assist both sales staff and clients to design the building exactly right. Changes of size, colours, bay spacing, roof pitch, awnings, doors and window placement are simple and immediate. Custom solutions needed include interface with accounting functions, in house roll forming and production facilities, and quality control systems for product despatch. Web based data allows for, instant download of price changes, product information and delivery advise.