Clearview RC Flight Simulator is a reasonably priced RC flight training tool at US$40. The physics and graphics are not the best, but it runs on computers with lesser specs, as well as VMWare Fusion on Mac.
It is better crash and burn on a sim than the real thing. The Clearview RC helps you practise landings and flips on helis.
You can train with your usual RC transmitter, with a USB dongle available at most hobby stores.