Unless you have a wet saw you should probably go with a grinder with a diamond blade. If the rock is fairly soft you could go with a diamond blade in a skill saw. I have a lot of tools left over from when I was a contractor so I have more than the average RezDog. I work a 21 day shift in a remote location so it affords me a little more consecutive days off than most folks get. Once my hours are averaged I do still have 46.6 a week though, just in bigger blocks. You could always start by chipping your rocks and sorting them by potential. People who live in or near larger centers always have the option of renting tools too.

P.S.
rock dust is really bad for you, if you are dry cutting wear a mask