which hosting ?

we would like to launch a french community platform to allow to our members :
- e-mails
- personal blogs or sites
- we provide our own ads on all pages of the site + all communitie's personal blogs/sites
- a front home media site. we will provide articles / contents to the nonmembers.

we had in mind to use some tools at wpmudev.

Can you guide me which plan at page.ly is good for me ?
and do you provide installation and settings services so that you install all needed plugin for me ?

Thank you for answer