$200 can get you pretty far tbh. I've noticed there aren't many SMP/semi-vanilla servers, so I'm currently working on one packed with features. Considering there isn't much competition for it, it'd likely be easier for me. Instead of being extremely unique, just find a gamemode with little competition and add a slight twist to it.Exactly. Just because it's unique, doesn't mean it's going to pop off. To save yourself time and money, make a server, get a community rolling and go from there. Add the unique ideas later, a good idea isn't going to be cheap.
