HI and welcome. I have a Viking (big bucks) that does 8 way directional stitching. As mentioned above, depending on the length of your free arm, and the inseam length, you may or may not have enough room for the entire pant leg to be scrunched onto it. if you do want to pursue this, take a pair of slacks with you to the dealership.
I personally would also just open the opposite seam.