The wordpress platform (not specifically wordpress.com) has built in user account management, so only logged people cam make comments, you can use plugins to make member only pages. Probably insufficient for thousands of members, which could be better managed I suspect with typical forum software.
It is not a difficult job, there are lots of website builders in market who can build this website for you, i personally have experience with these guys, who are delivering best in low rates. You can ask them for it, i hope these guys can provide you what you are looking for.
Yes, you can do it with ultimatewb. It has built-in members/social network apps that you can use and customize the way you want. It's very easy to use.
sophisticated aspect. try searching using a search engine. that will can help!
I want to build a website wherein my website visitors can login to my site and I could manage them?
