I was going to recommend the Evolution 10 cc engine as well. I have a Kadet Sr, and I think that engine would be great.

I think the big question is to find out where this person wants to go with the hobby? If electrics are his future, then it might be best to start the investment up front. I prefer gas power though, and I recommend new pilots to gasoline. The days of glow power are coming to an end, I believe. No point in committing to that type of power from the outset anymore as we did in the past.