You an get the King 1k6k combo-stone from Japanese Woodworker for about $35, which leaves plenty left over for an Extra Coarse 3x8" DMT Diasharp, which will work great for fast stock removal, and keep your stones flat. Honest injun, that's about as good as you can do.
You can spend a shootload on stones, and you might in the future, but this is the perfect 'beginners' choice. They are all high quality items that I use professionally. They are good bargains for what you get. You will be able to use just this set for everything you need to do freehand, but obviously, you could spend $1000 on a set of Choceras.