I am a PHP and MySQL specialist and built many bespoke applications from large enterprise web apps to small sized web apps for local businesses so this is something I can easily do for you. For the budget I will provide a basic web site template, login, logout, forgotten password, rent statements, and view/edit their account details. The site will be coded in CakePHP / MySQL with XHTML (w3c compliant), CSS and maybe some Javascript if needed. Also data will be transferred to the new system. There are a few other questions I have so please get in touch if you are interested.