At some point I'd like to build a MC server. It would have McMMO, Essentials, WE, WG, Magicspells and some custom plugins. It would support up to 30 people. I'm wondering if I could run it from a computer with 8 GB of RAM. If not, what are the factors in whether a computer can host a MC server or not? Should I get a seperate physical server? Explain everything, please.