I think you can get a decent small electric plane (airframe, power system w/ battery, radio, charger) in the air for $300. Not sure about glow, unless you can get some used equipment.

While the battery is charging, you have a good chance to try and figure out what the old boys are saying... or listen to them swearing at their clunks, fuel filters, needles and mufflers.

edit: and glow plugs, glow starters, starters and power panels.

I will build a glow plane too, but not before I have a separate room for the smelly things

edit: Some people live with others who do not appreciate the irresistible perfumes that the LHS sells.