You're easily going to spend over $1,000 to get giant scale in the air, maybe buy one second hand RTF from the marketplace. Strong servos, fancy power, adds up quick. Look at this super deal and in Astor FL. You can go fishing, camping, and come home with your dream plane in one trip up I-4 to Rt 40.
http://www.rcuniverse.com/market/ite...itemId=1082065
It's glow 3 cylinder, easily get most of your money back auctioning that off for market value and replace it with a gas engine. Nothing sounds like a 4 stroke Saito.
OR $425.00 for plane, servos, and an os 120 four stroke. (was the original engine before I bought the
Radial) It flies great with the 120, but I had to have a radial engine.
OR $ 300.00 with only the plane and servos.