Mini Hub inquiry

Dear All,

I would like to have a Private satellite setup-link of 7 Remotes and 1 Hub(central Office).


The office - remote link is Data / Internet

The Hub Section
The Hub is already equipped with internet
Private Server(office software)

The Remote Section
Each location has maximum of 3computer running of  Client software (basically post data)

The Remotes, at the moment are link via Dial up link to the HUB(Central Office)

what I want to achieve is a satellite private link from Office-Remotes, Remotes- Office.

I read online about iDirect mini Hub
My plan for the remote hardware : iDirect x3(x1), 1.2m antenna, 3watts buc, Pll/Dro lnb
 
I would like to know what is the minimal hardware requirements to setup Hub Section for my private link

Thanks

Regards
A. O. Green
ao.green@areatechservices.com