Hi, I intend to build a website which primary purpose is for Specialists to market their service. This website has these requirements: Allows unique login, access, and management of individual web space within the website SEO-friendly Allows limited posting of articles and pictures Paypal-ready GoogleMap-ready Billing Management (for Admin) Allows Specialist to opt for "Premium Listing" where their details would be displayed on top of non-premium ones. Any constructive recommendations is greatly appreciated.
Based on what you have described, I would recommend a Wordpress MU site with Buddypress, but you will have to get a few premium plug ins to get all of those functions., especially Pay Pal, and Billing Management..the rest you can find as free plug ins.
Joomla your requirements through 1 to 5 should be easy to do by lots of cms, Billing Management is a Key points， JBudgetsMagic or jAccounts extensions for joomla can help you. the last one... Frontend Access Control extensions: HIDER, Article Access Plugin, etc...