I think this Frank Otremba was born in 1860. If so, he was the son of Johann and Anna Rosina (Hesch) Otremba. I have six Frank Otrembas on my tree, and "Buffalo" Frank could be two of them. I'm thinking it's this one because he would have been 49 in 1909--old enough to be a 'prosperous' farmer. We don't know what his neighbors thought.
Evidently, he was a visionary, with the cash to back up his theory--why NOT try to cross cattle with Buffalo?