Then you'll be buying a crankset which is the best value compared with either arm or chainrings. Consider looking for one with the same bolt pattern so you can keep these rings as spares.

BTW- It's rare that BB height and crank length bring pedals down low enough to make a bottoming problem. Pedal width is usually a bigger factor. Then most good bikes can bottom a pedal (you should see the lower bottom of my road pedals) and the key is to keep the inner crank up as you coast through hard corners.

I just looked at the frame's specs, and the BB is 3" below the axles which isn't especially low. But since this has 26" wheels it brings up a pedal clearance question. What's the tire width. @6" tires come in a large spectrum of widths, and the height changes along with the width.

You're thinking of shortening a crank arm to gain 5-10mm added pedal clearance. But changes in tire width can change clearance by 25mm or more. Whatever you decide about the cranks, it might make sense to raise the frame by using wider tires. (but even, inside pedal up on hard corners).