e-Contract solution Application

am looking for a person for to develop and potentially manage an e-contract solution for real estate agents in our city. We are looking into the viability of developing our own in-house system that provides a place for clients to sign real estate contracts electronically. These docs would need to be stored on a secure server. There are about 30 different kinds of contracts. These docs need to be stored on a secure server with certain fields that would be editable (such as property address, client name, sale terms, etc). The ideal solution would be for the agent to send a link to contract to the client via email. If there needed to be changes, the agent could make those changes and the client could either close the browser window and click the link again or refresh the browser window to see the modified file. The interface would allow the agent to access the docs wither by address or by client name. The interface wants to be very simple and easy to use. Real estate agents are often older and not too web-savvy. We'd also prefer to have a system of notification whereby the agent would be sent an email or text when a doc is signed. Finally the docs would want to be exportable via PDF. After building the system, we would likely look for someone to support it, though that doesn't necessarily need to be the original developer. The underlying principle on this is simplicity. There are a few other companies out there that offer similar services, but they are more complicated and somewhat expensive. We want very simple. Think a Timex analogue watch simple. let me know.. what solution do you propose and in what language, I am bit unsure, only bidders with available solution and with knowledge will get this job. --------------------------------------------- No Time Wasters with big portfolio in my pmb or will be simply ignored!! until its related work! --------------------------------------------- Regards. PB.