Hi Newb, and welcome to RCU!
I myself just started in the hobby and I purchaced a nice trainer as well (A Hobbico Nexstar). After about 5 flights, I am on track to solo it within 2 weeks. But at 17 years old, I have the pressures of college decision, so I can only fly on the weekends

... wish I started at your age!
Anyway, that trainer will certianly last you a while. I am not getting another plane until I can do all my aerobatics nice and smoothly. And yes, it may not seem like it, but trainers DO go up to the 65 MPH range! By the way, what is the exact model of your trainer?
I think I am in the same situation as you as far as the cashflow goes, but I did one thing to fix that problem... I got my dad into the hobby! I've went from $0 to unlimited cash funds!
Have fun, and welcome to the addiction...yes, you will LOVE it!
-MikeG