Certainly as far as trainers go ,you can buy a .40 trainer ARF for like $80 and cant build one for that not between kit,covering,misc hardware, cant be done for that,, and some of the more popular planes are offered in ARF too,,but they are much higher$$...I personally do 1/2A stuff and like to build from plans/scratch its part of the fun for me,,,you crash $10 worth of balsa and you dont feel so bad, and all the stuff will go into your next $10 plane