Correct me if I'm wrong here, but I'm guessing that the whole reasoning behind this is that you're concerned about cost.
If that's the case, you probably won't do any better than this set at amazon.
That's the one I was talking about that includes the 220/1000 combo, 4000/8000 combo and a flattening stone. (You will need some sort of flattening stone if you're working on razors anyway) That will get you all the way from repairing major damage up to the minimum you can shave off of.
Follow that up with whatever finisher your budget allows, whether that's a Chinese 12k, Escher, 16k, or just pasted strop.