I would say I spend about $1000 a year but I fly a lot of .46-.60 size planes. None of which are ARFs at the moment and most of the ones I do fly are SPADS. I have a 3D profile that I built out of a Decathlon that was crunched pretty good now it has been reborn as the Phoenix. It was an experience to go from a high wing sport to a midwing 3D but it just goes to show that you don't have to invest a lot to have fun and fly cool planes.