The last time I priced the Remora (not the pro model) it was 159$. IMO, for a great skimmer that will do the job nicely for a 30g tank, that's a great deal. I wouldn't recommend anything else either.
While I can understand needing to save money, the skimmer and the lights are two things you just can't really skimp on all that well. However, just about everything else in the system is fair game. Heck, for my 75, everything else came from home depot, including the sump.
J.