Thats the rub, isn't it?

I was new to this hobby about 10yrs ago. I started out with a 40 size trainer. Just like everyone else. Built a 4*60. Built a Kadet Senior and modified the snot out of it. Bought bigger planes. 60 size motors. 90 size motors. 1.20 size motors. Bigger and bigger. Bought 150 and 180 size glow motors. Bigger and bigger. Bought the 2 cubic inch and above glow motors.

Got tired of the expensive fuel and the crude/rudimentary carbs. Sold all the big ones. I keep nothing but 40-50 size 3D planes or bigger gasoline powered planes now. The mid range stuff, for me, became more cost and trouble than it was worth. The engines are expensive and they use a ton of fuel at $15-$20 per gallon.

You're smart to avoid the larger glow motors. It took me 6yrs in the hobby to figure that out. []
My list of glow motors now:
1 - Magnum XLS .46
1 - Magnum XLS .52
1 - Aquacraft .46 (Tower .46 clone. It's all Hobbico)
4 - Tower Hobbies .75

They are all sitting idle, except for 1 of the TH .75 engines.

The rest of my planes are gasoline powered.