RC 'copters
FlyBoy;
I was intensely involved in learning R/C choppers (for about a year) in 2000. I now don't have time or space to fly them, but will tell U what I've learned.
First of all, the choppers are awesome. I built 2 Kyosho Nexus choppers. I was a rank beginner, and had no help, but I did read Ray Hostetler's book, and took the hobby quite seriously. The Kyosho models are well-engineered and easy to build and setup if you are detail-oriented and a little mechanically-inclined.
I spent a good deal of cash on the hobby: $1,000 for each model w/ radio, plus another $200 on support equip such as starter, battery, fuel pump, blade-balancer, battery tester, etc.
It takes a long time to learn to fly these things. Training wheels are a must while learning to hover. After about 3-4 months (2-3 sessions per week) I was doing large figure-8's at fairly good speed, and got cocky enough to try a nose-in turn (where the choppers nose crosses your line-of-view) and for that split second, the controls are "reversed". Well, I dumped the machine over and heard the awful sound of a crash. I had to rebuild the chopper with about $150 new parts (rotor blades, main rotor shaft, push-rods) and many hours of shop time.
You are also the mechanic, so be prepared to work on it alot and have some mechanical down-time. The reason I bought 2 was that I was serious about learning to fly and wanted to always have a working model even while one was awaiting parts. Except for about a week after that crash (my only mishap), both models were always in flying condition.
Figure about a year or more of training before you get into serious aerobatics. Definitely invest in a computer simulator. I did not have one, but it has to save lots of time and money, since eye-hand training is the essence of controlling a chopper, and you have to be really good! And the ability to manage all spacial relationships is an added challenge that the pilot of a real chopper does not have (they are always in the seat facing forward).
Choppers are very complex machines, and the little models are miniaturized, awesome renditions of real helicopters. You must take detail very seriously to succeed at this hobby, since the heli has to be finely tuned and setup in order to fly.
I would still be flying them if I lived in a place where I had the space......I now fly for an airline and live in an apartment with no nearby fields. Someday maybe I'll fire 'em up again.
Let me know if I can help U any more. I'd be happy to help you out. Go for it!