Wide range WiMax transmission

Dear all

Please i need your contribution and solution to my broadcast headache. i have a proposal for an estate in my region. i want a wimax solution that can beam between 50km and 70km in 360 degree, just like an ominidirectional antenna. the end  users might not need a CPE just with the wireless cards (802.11b/g )on their laptos or desktops. also i need a software solution that can easily manage the subscription (using pay as u go method with PIN numbers) simply a hotspot software solutionwith features like. Customized billing tickets, customized startup, login page and log out page. customize message. Finally does anybody has idea on how to setup this nature of network? what will it entail. Look forward to hearing from you ALL

Best regards'
Femi Delson
delson_ola@yahoo.com

thank u Eric