That means that five years of labor has netted a salary of $60K per year (only $30k from YouTube)… Almost certainly that’s top line revenue and not net profit.
That’s… not much for the work involved. The benefit here is with this strong presence and smart thinking he can likely turn this into significantly more income. Perhaps as an affiliate for travel sites or packaging historical vacation packages. But it certainly dissuades me from any business model where showing ads is the primary revenue driver (unless you on a platform, of course, a la Google, Meta, et al.)