So here's the deal, I lead a pretty large Arma 3 Unit. We pay $29/ month ($348 /year) renting just the Single Arma 3 Server + TS Server. We're growing in size quite substantially (Just hit 35+ active players) and are in desperate need of increasing our Server Capabilities. However, our operating cost monthly/yearly are already pretty expensive for what we get and we're looking at purchasing/building our own server unit to host 2-4 Arma 3 Servers + 1 The TS Server.
I have been looking at Refurbished Dell R710/R720 and am having a hard time deciding if that would be the best option. According to the wiki, the recommended specs for each server instance is 3.4 Ghz, 4gb Ram, and 320GB of Storage (500GB w/ mods). So I know what specs I need, just don't know what server unit to go for and I need recommendations on what kind of server unit to get (Rack. Tower, Etc).
P.S. On the component side, I am leaning heavily towards a Dual Xeon (X5690) system with AT LEAST 32GB RAM (64GB Preferred). However, I am new to setting up a server box and working with VMware, so if I am wrong on any of this I would also appreciate tips.