If you happen to have that large a community within a reasonable distance, sure.
For Dan promotions, we will invite a couple of the Moo Duk Kwan GM down, but they're only about 90 minutes away by car.
If we had to fly them in from another state and have a guarantee of XXX present for the promotion... the cost would certainly go up, for one thing.
That's true. There are enough KKW schools around here that getting enough masters together to make a panel wouldn't be a problem, assuming the examiner's class isn't a huge problem, but in an area with very few schools.... well, Kendo has this same problem, to go back to my earlier comparison - my state has one Kendo promotion every year, an hour drive away. That's not a good option for a neighborhood commercial TKD school.
What I'm hoping for is that the lowest level examiner course will be available as an online class, and the panels of judges for 1-3 dan/poom can basically organize themselves with some minimal oversight from KKW/USAT. I feel like that should be enough to make sure that everyone's on the same page, nobody's doing anything outright fraudulent, etc, without being too onerous on schools. If they want to have national tests for 4th dan and up, I think that's pretty reasonable. I mean, I think the huge concern is when you have masters (like some of those videos on another thread) who were promoted over and over and still don't know what they're doing and are teaching the wrong things to their students.