How picky are you about sharpness? If you like a toothy, hair shaving edge, then you can get a Norton combo Coarse/Fine stone for about $20-$25. If you want a smooth, hair whittling edge, then you can get that from the Norton as well, it just takes a lot of practice, and you'll have to be satisfied with whittling beard hair. I have a 204 Sharpmaker and like it a lot, but without a coarse stone, you'll run into problems sooner or later.
Edit: a 204 and a belt sander work very well together. Use something like a 120 grit belt to set the edge bevel lower than the 204 setting you want to use, say at 10 or 12 degrees/side, then use the next higher setting for the 204 to remove the burr and refine the edge, in this case I'd use the 15 degree/side (30 degree total) slots. You can go back to the 204 several times before having to use the sander again, unless you damage the edge. You can even prolong beltsander use further by going to the 20 degree/side slots after the 15 quit working as fast as you'd like. Practice on old/cheap knives first. You'll ruin/overheat several before getting the hang of the belt sander. Also, a 12 degree angle on most knives is much shallower than most people think, and will hit things like thumbstuds and disks if you don't remove them. Finally: beltsander + 204 + recurve blade = easily sharpened recurve - if you like that sort of thing.
