You've got two ways to go: (1) cheap at HF or (2) premium top dollar.
You are going to have absolute heck cutting oilfield tubing and sucker rod. Wholly different animals from 'plumbing' material.
You are going to eat up wheels terribly fast either way you go. Better would be a metal cutting diamond blade if you can go that route on your machine, depending if you're planning on being in a production environment.
That tubing has been work-hardened from stress, especially within a foot or so of the ends where tongs have bitten it.
Sucker rod is intentionally high-carbon springy material and can be hard to cut, especially if it's been removed after a downhole rod failure where it was jolted hard. I've seen rods almost tied in knots they're so flexible.
Another little point most people aren't aware: all downhole tubulars (incl rods) from oilfield production are slightly radioactive--called NORM naturally occurring radioactive materials. All that dust and particulate matter you're going to get when cutting (or smoke when using torch) is lightly NORM. Use a good mask or smoke / dust sucker fan in your work area.
There have been well documented cases where yards working oilfield tubulars have been found contaminated and had to be cleaned up expensively. Just be cautious.