While it can be done by an experienced builder who can build light and choses to use a single cylinder like a ZDZ80, 33% planes simply fly better with twins. That said, you will spend roughly 2X on the 33% over the 28% most 33% planes require 2 servos per aileron, matchboxes, more wiring, bigger batteries, more expensive receivers.. etc.. etc... it all adds up really fast. My 28% plane was $2K, my 33% over $4K

Just fly your 28% for a season or two and have fun. Bigger is better, but work up to it..... besides why worry about what everyone else has.... concentrate on pilot skills and when you get the bigger bird you will all the better...

DP