wHAT DO YOU GUYS THINK-- GOODIDEA, BAD IDEA...?

The only reason I ask is because I am trying to get the stuff that will allow me to grow into a second plane without needing to buy another engine too.

I have a futaba 6xas for a radio, I was thinking avistar for plane with tt.61 pro for engine--any info would be appreciated.Would I also be correct in assuming that i needto reinforce the plane for the larger engine.....anyone else runninf a set-up like this?