I'm considering investing some money into running an RSPS, though I'm not sure if I should purchase a Linux or Windows VPS. Although I'm sure you can host it on a Windows VPS (correct me if I'm wrong), can't you do it on a Linux VPS? As it is a tad cheaper.
You will need atleast 1024mb RAM, anything lower and it won't be able to run the server without any lagg.
Make sure your host has ddos protection, because some RSPS's just take down others for their own gain..
I am running on a 1Gbps line so my server almost never laggs.
My host also has over 10 years of experience with hosting vps's and dealing with ddos attacks.
It does cost $49.99 a month though..