Buy the best you can afford. You won't want a clunker. Don't get a flimsy one either or it will shake in the wind. And you'll need a solid tripod and good filmholders - beware of old warped ones. 8x10 will give you a workout, so keep your knees and back in shape. When it comes to lenses, make sure they have enough coverage for 8x10 film. You don't need a lot of them to start out. Get used to one
at a time and save the rest of your money for film. 8x10 is an expensive addiction!