I agree. Small electrics 'might' be a bit less expensive to get started with, but if you move up in size the price can be daunting.
Go to a local club field and talk with people. If you don't know where the clubs are in your area, go to the AMA website and use their "Club Locater" page to find a few.
http://www.modelair.org/
If you're planning on trying this alone, then get something like the Aerobird Challenger, or get set up with a GWS Slow Stick or it's equivalent. Trying a 40 size glow trainer (or any other glow plane) on your own will most likely result in a pile of sticks in about 30 seconds. [

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Welcome to RCU, and have fun.
Dennis-