php web application updates

We have a web-based PHP/MYsql application that needs updates and enhancements, ? including MYsql query speed issues. ? I will provide all of the php code and a copy of the mysql db. Updates needed:? user role enhancements? mysql query improvements to speed.? automated email addition additional search params.? additional reports added? changes to existing reports needed!? other minor changes. ? I would like to develop a relationship that we can do on going updates as needed in a timely manner.