It wouldn't have real glass in it. It would be lexan, I think. As for the motor, it could be electric, like an RC car. There are gas powered RC cars too I think.
Look, a 1/6 scale Mini Cooper that looks about as much like a real mini cooper as this Hot Toys looks like the 89 Batmobile if not more so, for $130 retail.
https://www.hobbytron.com/1:6LicensedMiniCooperElectricRCCar.html It has working head and tail lights, as well. The Batmobile would have a little bigger body, make an interior for the figure, add another $75 for the grappler, discs and guns, and there you go. You could have an RC Batmobile that could hold Batman for around $300, I should think. $400 max. Imagine what fun you would have if you mounted full auto airsoft or bb guns in it. going around a big parking lot, shooting stuff up...