It's not about the money. I think every school district in my state will bus you from anywhere in the district to whatever magnet program you were admitted to. It's free provided by the school district, for EVERYONE. I'm not from a rich district either. Sucks you are from a rural part of the country with few options, but that's not most of America.
Moral of the story: don't live in a rural place. I think my district has 12ish high schools all with around 2000 enrollment. lol my elementary school had more than 400 kids. You are going to have less choice when there are only 400 kids in the damn district.