How good is a Intel Xeon E3 1225v2 4 c/ 4 t 3.2 GHz+ 32 GB 3 x 120 GB SSD for a Network with All of the following: Minecraft: Factions 7GB Prison 6GB Hub-1 1GB Hub-2 1GB Skyblock 7GB KitPvP: 5GB Other Things: 2-GB Teamspeak 3GB RAM Spare. How Many Players can It Handle.
The 1225v2 is pretty low-end for an E3 but I've heard from some that it could bottleneck roughly 300 players.
I think you overestimate RAM usage. Java does not do well when you just keep throwing unnecessary extra RAM at it. Those servers should do fine with a decent amount of players. Unless you have a reason to expect a substantially large amount of players, that will be fine.
Dont even run multiple servers, gather your playerbase first and expand when you get players.... (unless you're using ads to get them when you release??)