TX
If you’re looking to do the course and then teach rather like a paid hobby then what have you got to lose other than the cost of the course? A former airline colleague asked me the same question recently and given the typical pay rates for PPL instruction I advised him the economics probably don’t stack up.
If you have the enthusiasm to teach then go for it but I to confess I have no idea what the course will cost these days. I’ve only ever taught part time and so my enthusiasm for teaching has never waned which perhaps might have occurred otherwise. Just my perspective. I don’t do sweeping unsubstantiated generalisations!