I tried to pull up the full article from the Dayton Business Journal.
But you have to subscribe to read it.
Does anyone know if all or part of this facility is paying paid for
by outside donations ?
According to their student paper, entirely by private donations, so I'll concede them that. Money is fungible though, and unless it's some single donor who zeroed in on an equestrian program, those donations are most likely being steered away from other areas of the university. That's still an instance of misplaced priorities not to mention a glaring example of the conceit with which the school views itself.
And as I pointed out above, a far more serious example of that conceit is their turning their back on the state to pursue more and more out of state students in a way that goes far beyond any consideration of regional diversity, the pure hubris of if they can't beat OSU inside Ohio then they'll take their ball and go elsewhere.
I may not like everything about OSU nor agree with everything they do, but I do believe that they are committed to the taxpayers and economic development of the state of Ohio and provide the state with a solid AAU research university. For the life of me, I fail to see any such commitment or benefit to the state from Miami, so I thinks it's fair to question whether continuing to support a university that clearly doesn't see itself as an Ohio public university is in the best interests of the state or its taxpayers and whether those funds could be better redirected elsewhere in the system.