RE: Engine advise
That plane looks like a Sig Kadet. Normal power would be an LA40 which is plenty of power for it. Any 60 size engine seems like way too much. Seems like a gasser would be too heavy and an electric too complex. Are you sure the airframe will withstand the excess power and weight?
The obvious answer is a LA40 which most of us would be happy to donate to a new modeler. I would give the guy a LA40 and save the more complex power systems, gas or electric, for the next plane.
People have been predicting the end of control line for years. Funny how it seems to be GAINING in popularity. There is an attraction to simplicity that appeals to some, myself included. Glow is simple, reliable and inexpensive for smaller planes.
If you can't tune an LA40 you will NEVER be able to tune a gasser or figure out what electric power system to use with your airplane.