I would say gas would be the way to go. If you find a good conversion engine, its cheaper than a new glow 2 stroke, and waaaaay cheaper to run. Even a good used gasser will keep cost down. Also, with a gasser, there is a pump built into the carb, so tank can be virtually anywhere in the plane, and cause of the better fuel economy, it can be a smaller tank too. As per tuning, there is probably someone in your club that can help. Its actually not that hard to tune them, just different. And once they are tuned, the settings stay put, unless a change is made in prop size or if the temps drop or raise considerably.
Either way you go, I hope you have fun.