We have both gas and electric. We prefer electric even though their
maintenance is more expensive and time consumming.

Electrics have more low end torque, quieter and smoother. Gas is
faster when you want to zoom down the flight line, but not great for
towing at walking speeds.

With two electrics we can run all day without an issue and we can get
40-50 and more flights a day (lots of training).

My $0.02.

- John DeRosa