Is square tube stronger than round
Laser cutting machines can cut sheets of metal in seconds. It's possible to do the exact same thing with a laser tube-cutting machine, but that's another story.
Be aware that there is no perfect tub. They may have bows. You may find weld seams on both the outside and the inside of the tube. When there are inconsistencies between product runs, it can be a challenge to process the material efficiently and consistently.