Big electrics cost big $$$ in battery packs and electronics to control them. Typical electric powered planes are small and most are under powered. This means that they should only be flown in calm or near calm conditions. A standard 40 size trainer will be able to handle breezes and moderate winds if they should come up and this set up doesn't have to be expensive. Also have you considered that after a standard 10 minute flight with a glow powered plane, you lnad, refuel and take off again. After the batterys have died in an electric powered plane which will likely only give you 8 minutes or less fllying time you have to land. Then to fly again you either have to plug in a "fast" charger and wait about an hour for the batterys to recharge, or pull out the pack in the plane and plug in a spare fully charged pack. A normal days training will consist of 6 flights. With electric power, you will need 6 battery to swap in and out. OR a few packs and a good fast charge and a way to keep track of whats charging and which pack is waiting to be charged. Thats if you have a power source for the charger at the field! Price out spare packs and a good charger and see if you still think that e power is cheaper!! It certainly doesn't seem more convenient, to me any way.