The County Fair
"The County Fair" begins with a nasty rich guy threatening to turn an old lady onto the street--unless her niece (who lives with her) marries this man's son. While she's dead set against it, the niece is a sweet thing and would do anything to help her aunt--even marry the rich jerk. However, a possible way out is presented. When a poor young man is taken in and fed, he turns out (naturally) to be a jockey and thinks he can win the $3000 prize at the fair and save the farm.
Starring Helen Jerome Eddy, David Butler, William V. Mong, Arthur Housman, Edythe Chapman, John Steppling, Charles Barton, Wesley Barry
Watch "The County Fair" from streaming services Amazon Prime, MGM+ released in 1920. It's a drama movie, and has a rating of 5.5 out of 10 from Imdb which is fairly okay for this kind of movie.