I have a combination1/3 workstone from naniwa, a cheaper version than a naniwa super stone. I only use those when i must setup a new bevel.
I use a 8k ss and for the finish a ss12k
Some qrox and leather.

So when you razors on this time are shave ready go only for the 8 and 12k ss! The rest of the stones you can buy when you are ready for it and have the funds.