Tweakie, you have been immensely helpful.
But I feel pretty dumb now, even as a noob.
I went back to check my motor setting and x and z were set way too low! That's why everything was cutting in what seemed like millimeters instead of inches.
I changed everything to the correct settings and the files are all in the correct inch dimensions now, even without the G20 code.
So hopefully this will help some other newbie that finds themselves facing the same problem as me.
Once again, thank you for your time and help.