Well, I agree with Jim that it can be done with few stones. And I admire the elegance of minimalism.
A pair for the lower end being about 400/1200 for repair/bevel. And it can certainly be the stones Jim lists. Myself, it's an atoma 400 plate with an atoma 1200 pad glued to the back. Less cool than real stones, but functional.
Then yes, a convex soft ark glued to the back of a convex black translucent ark. ($115) So I could get by on a desert island with just these two double backed items. And they are self maintaining and will last for many years. And you can use just water if you have to. It's a very "prepper" way to go.
I say that I admire the elegance of minimalism. But not in my out loud voice as my wife would just point to the collection of rocks, plates, balsas, pastes, and lapping plates that are now filling up multiple drawers.
I am happy to report that my honing kit fits nicely into a 12x18 plastic case with a lid. Since I tend to scrutinize the razor auction before purchasing, I have not bought anything that is chipped or cannot be used to shave. My use/need for a low grit stone is little to to none. That said, a 30mu film is equal to 600 grit. I am not currently on the hunt for more straight razors and what I have are performing near shavette.
I could see myself going back on a few razors just to do a film/stone progression to see what's possible. More likely, the stones are going to be used to learn to sharpen my knives.