If she enjoys this, go for it. But don't expect a lot of income.

The median OF earning is $180 month. There are a lot of big payouts, but mostly to the top 1% earners on the site. Approx 2 million others are making content. Specializing in the hair fetish should be a plus if she can attract the followers. But a lot of the income is from specialized content sent on request to followers so it is going to consume more hours than expected.