The other fact of Electric Power is cost per flight at fast speeds or aerobatics.
The LIPOS claim 7-10-15-20 times the rated amps. NO WAY the battery or motor will give you FREE power to compete with a glow.
Batteries last 30 to 50 flights and they are dogs to fly any more times if pushed at 10 to 20 times rated currents.
Glow fuels do not catch on fire in crashes or during refueling.

ELECTRIC powered, good performing planes, are for people who can spend as much money as they want to prove a point.-------I would say $500 to $1,000 for the first year of a 48" plane would be the minumum for battery replacements in the 3000 mah, 4 to 6 cells range.
Any crashed battery pak is to be trashed for fire safety reasons.