Heat guns, at least basic non-thermostat models are dirt cheap and even the cheapes China models last surprisingly long. Mine is more than 10 years old now and cost €29 back then (roughly $40). I don't use it on a daily basis, but if I do use it then it's for paint stripping, so it might run for hours on end. It always sounds like the cheap bearings are about to give up but it works like a charm. I expect at some point either the motor or the switch will fail, that's how most cheap hairdryers bite the dust (also had some fan blades break).
