TKD is expensive because 95% of the schools in the US are belt factories out to generate max profit. TKD is not what it once was and I found it to be a waste of time and an even bigger waste of money in my experience. You are MUCH better off training in a more well rounded art that has its focus on combat, not sport ring-sparring.
And 85.62% of statistics are made up on the spot.
There are plenty of good TKD schools out there if you know what to look for.