I have always believed its near impossible to make a real living off guitars alone. Obviously, you are one of the few exceptions. But you make a quite a few a year, and charge quite a bit to make it worth while. And have a great reputation at that.
I can only think of a handful of single luthiers that make a living off just guitars, and have no problem maintaining that status.
Me, there are a few factors.
I would NEVER want to attempt to do this only for a living. It is too stressful as it is. And that would mean i would have to take on commissions. Which is my absolute worst nightmare, and will never go back to that again.
You seemed to get out there and get pretty well known extremely fast. Never seen anybody else do that so quickly and maintain that status. That is not so common.
In order to make even the poverty line, 10 guitars a year at 3,000 a piece. not that hard to make that many, but indeed hard to sell that many at that price.
To me, its possible. But the odds seem to be 1 in 15,000 or something. Seems easier to become a pro athlete than to make it big time in luthiery.