The discussion yesterday suggests that it’s way more than 27,000.
The forty-or-so areas in the analysis were not randomly selected from the population of about 200 areas, so the accuracy of the answer cannot be assessed and a margin of error cannot be applied. It’s mostly an extrapolation so take it with a grain of salt.
What you can conclude is that statements such as “The land can only support 27,000 wild horses” are incomplete. “The land can only support 27,000 wild horses because we’ve sold most of their food to the public-lands ranchers” would be a bit more accurate.