To buy or not to buy?

This next year i will be packing up my life and moving to Montana for college. I will be taking Orion down there with me. The cost of that would be anywhere from $1700-$3000 + food. When I get him there I will be having to buy a truck, trailer and hopefully a new horse. But that is the delemma, to buy a horse or to lease one. I'm going to have all these expenses and will need an older horse that i can ride hard and put it through its paces. Orion will be fun to have down there but I will need another horse seeing that he will only be 4. If anyone has a horse or knows of a horse that could attent college 2010 let me know! it would be great to have a friend's horse!