MYT Farms, I know there are several states where tuition refunds, or credits of some sort are offered for each year of large animal practice in the state. It seems there are variations, and there are good grants and/or scholarships available in many areas.
A good starting point for a young person like you who is interested might be to shadow a working vet in your area. Having a grand daughter who has wanted to be a vet for as long as she can remember, I asked our local vet if she could follow them around a bit. She got a wonderful look into the profession and was allowed to do some hands-on things that helped re-inforce her decision. She will start pre-vet studies in the fall.
It does seem that schools offering pre-vet studies are quite eager to help prospective students, so if you have such an inclination, my guess is you will find lots of helpful people.
Re. working with cattle or horses, it seems to me among vets I know, or know of, there are quite a few who specialize in one or the other and those who maybe don't care for, or are not as knowledgeable about one or the other can find another vet at a doable distance to handle the critters they have less expertise with.......even in western SD with bad sparsity factors in the best of situations!
How much highschool do you have left? Are you studying as much science and math as you can get? Our gal has been able to get in quite a few basic college courses during her junior and senior highschool years, so will have more time for the hard stuff at college. She will be in a financial tight spot, so has to stay ahead of the game as much as possible.
She has commented that if only her parents were a homosexual and a transvestite she probably could qualify for all kinds of big time financial assistance.......but she is stuck with such normal people she doesn't qualify for much, other than the academic stuff she has already won. Pretty sad when that is the case for too many students!!!
mrj