I have overlooked your project details and understand the requirement.
1. I need to see your templates in jpg.
2. Individuals and Businesses to create user profiles and communicate with Contractors. (OK)
3. simple and advanced search for Contractor, based on specific search categories including location. (OK)
4. individuals, businesses, and Contractors to Post Requests for Jobs, where Contractors can respond to. (OK, JOB Modules)
5. simple networking between Contractors, Individuals, and Businesses. (Website will be business networking, OK)
(XXX)6. The Individuals can automatically track ongoing jobs, and get information on previously completed jobs (XX- Which type of Jobs. Is recurrements type or bidding type, It's not clear)
7. chatting and messaging (Free/Paid , OK)
8. accept payments for services, or donations (Ok).
Here Point 6 is not clear. After that I will think platform to build website.