Setting up Prosites / Buddypress multisite

Hi
For the site : SmartVillage.scot
I want to be able to easily start new subsites, for new village communities, and have two main questions:

1) I'm thinking Prosites could be ideal for managing this, my main question / requirement is to define a template for each new site, so that I don't have to repeat the basic shell set up each time? Can I build one site and define it as a template for this?

2) I want each subsite to have its own Buddypress/ bbpress forums. I've raised this on another ticket where I've run into issues, and think I may need a multinetwork plugin etc.?
Any experience of doing this combination Prosites + BP multiste?
thanks, Neil.