Alright. This is usually self explanatory but sometimes, first step is usually the hardest step.
You don't need a brilliant machine. Most machines can be server no problem. As a server, all it does is to receive and send out information while keeping clients coordinated. No pretty graphics nothing nice on the server side. Think twice before you start playing with stuff server side. Luckily, most server parts are now fully portable (eg. unzip instead of install) and you can readily make up by copy and paste. However, note that server is not 100% portable... especially when it comes to large model (island size...) that exist in the island.