There are people who do similar things. In the Tampa Bay area (Florida) there is a nature park with an educational center. they have a few people on staff full time that take care of the animals (mostly reptiles) and do presentations both at the nature center and in schools.
As for there being money in it? I'm not sure. I know that the people who work there full time are doing ok and at least one of them was a single mom. But besides that I couldn't say.
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