Piping MTO Processing application

I have an idea of creating a web based application for piping material take-off and processing. The application will process bill of materials, creates summaries and reports for procurement. I am a piping engineer who has knowledge of piping materials and the methods of electronic processing of data. I will be able to guide a developer in the task of design implementation and maintenance. I am looking forward to developers who can partner with me on this. Intially I am thinking of doing as a small application based on the the google doc spreasheet. The application can then be floated on the net to attract users. Once the application becomes known, it should be possible to get a revenue. Depending on the success it progress further into a more sophisticated application.