How to get a load from the database to a group, not RG

Hello bubblers, I have this little question.
I am developing a web application, where to develop my budgets. Now if I can put it as simple as possible.
I have a Table of Requirements, another of economic proposals and another of details.

  1. That when the user presses the submit proposal button, a proposal with a total of (0) is created. Done
  2. That the submit proposal button be hidden so that the proposals are not duplicated. Lost
  3. Every time this user loads the request page, he can get a pre-proposal. So that there are no double records or repetitive records. More lost.