Malware Scanner - with a twist

I want to create a Malware Scanner/Service that integrates with a web hosting company's internal systems (WHMCS, HostBill etc). The web host would be able to upsell the Malware scanner as an add-on or include it with all plans or selected premium plans. The software contains the following parts: 1) Build a centralized database of malware definitions from opensource locations. 2) Build an API to expose the definitions as rules. 3) Build a web crawler that will do the scanning. 4) Build a WHMCS plugin that will power the web service for clients. 5) API Management and integration with 3scale.com. 6) SiteSeal connected to the API for clients to display. 7) A website for this service. Please see attached file for complete details. I will choose a developer that has spent more than 20 minutes thinking about this, provides a pricing scheme based on each section with timeline, has experience developing complex software with scalable APIs and provides some useful input or feedback to get my attention. Thank you for your time.