We have ~15 VPS servers (DigitalOcean with Droplets and others), on board is Ubuntu with root console.
You will need to install this amount of servers, with best configuration of OpenVPN (must be the most speed configuration for user connection and without user/password option)
Hours to be determined
Less than 1 month< 1 monthProject LengthDuration
I am looking for freelancers with the lowest rates