custom captive portal page/customer area for basic users

Currently I have a hotspot business. Hotspot users use the same page to login and access internet/purchase internet by going to the same page I use to login and admin the site. I need a custom captive portal page, that will allow users to login, display announcements from the hotspot operator, and display plans for purchase. Nothing to extensive. The features are all there, I just need it in a clean captive portal page that I can easily replace the logo for other customers to have a branded solution for them. Must be familiar with hotspots, captive portal, and can provide examples of your work. I will not RELEASE MILESTONE upfront, but I will create milestone payment and release based on your performance and progress. Thanks for your help.