Searching for module to install personalised membersites automatically with registration (for networkmarketing)

Hello,

hope, that there is anybody who is not as a newbie as I am and is willing to give me a short answer with my problem. I am searching for a module or a way, that gives every user with registration automatically a personalised website with own contactdetails etc... for network marketing.
Like this: user signs up with his contact details, then in his backend he can make his own website (subdomain maybe) with limited editable content and contact details.
Does anybody in here made some similar already?
I would be very glad about every kind of answer, it is very appreciated, thanks in advance.

Best regards