If you want an easy flying plane that is cheap to fly, put a 46 size OS or ASP on it. I fly a Tower Hobbies Trainer 40 with just an OS 25AX on it and it is a blast and my regular flyer. Also built an 82 inch wing for it and use that 95% of the time as hammerheads look so pretty with the bigger wing. Those Chinese ARFs are built fairly light so you can get away with smaller engines.