Hey I am putting together a Cap 27% from GP on the cheap with said TBM servos. I will be putting a thread up next week covering it. I have flown two of them so far with 50cc engines. I happened to find a BME 44 cheap so thats what I will roll with for now. Should be light enough to be fine with it.

Honestly with the servos, gas engine, and components you will need its likely your costs will be close to that of 50cc gas. I have had a bunch of 50-150cc planes so I speak from experience.