51697 Website Monitoring system

We are looking for someone to create a website monitoring tool. It would monitor Http, Https. Interval would be user selectable 5,10,15,30,60 minutes It will have a web interface for users to signup. Program Specs: Http / Https Monitoring uptime calculation (shows the percentage of sucessful checks) mysql backend multiple plan system (free, paid plans 1,2,3,4,5) plans would correlate the frequency of site checking (free 60 minutes paid for lower) multiple alert mechinsm - email, sms payment system with recurring billing (internetsecure/paypal) autosuspend on non payment User signup form with email address verification autodelete accounts not verified in 24 hours ability to monitor more than 1 url with the same account (example: user wants to monitor 3 free urls and 2 paid urls) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ User Interface Specifications: Main Page: Urls monitored, uptime statistics for each Account Management: Plan Upgrade/Downgrade/Cancel Credit Card Update ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Admin: Main Page: List Active account List Suspended accounts List cancelled accounts List Successful payments List unsucessful payments Search for Account by last name or email address Account Pages: Account Contact Details Payment Details, update Credit Card ability Url's monitored Url Statistics (uptime stats) Alert Settings ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NOTES: Program should be modular for payments, alerts, monitoring types so that we can add or remove them in the future.