Profile page as first page

Hello-

I am creating a multi-site network and all of the subsites, I have the restrictions set so that there will only be one page that will be shown (user cannot create more pages or posts). I would like for the one page to be a profile page, and the users (using an extended profile management plugin)will be able to build out that one page with images, videos, social media, and status updates.

My question, is there a way to make the user profile page the homepage of the individual multisite page (mynetwork.com/user)? This way I could set up a whole network of one-pagers and a directory of them all on my main site.

Any comments or suggestions on how I am doing this would be very helpful, and thank you very much.