I have been quilting for others for over 3 yrs. I only do pantos and I charge 1 to 1.7 sq inch depending on the density of the pattern and I use solid and varigated Aurifil thread. Others around here charge 1.5 and up plus a $15 set up fee.
I quilt as a hobby and not to make a living so that is why my price is minimum $35 and 1 cent s/i . I just want my quilting to continue to pay for my hobby because I am retired and do not extra monies for fabric and quilt retreats like before.
I would not be able to pay over $150. to have one 100 x 100 quilted. I would have to stop piecing tops.