Know nothing about the Sailrite, but I have a Consew upholstery machine--basic straight line walking foot. Total beast--will sew through anything. It's old, but built for industry so no computer and lasting. I can get it serviced by my local repair show--but taking it out of the table requires my son to do the heavy listing cause it's heavy!
you might look around for something similar. On another note--I saw workers at the Stover (MO) Quilt Shop using the Consew and similar Singers to quilt edge-2-edge. They had a wood frame (about 10" wide and 12' long) that they attached the section of quilt to and it was attached to pulleys on the ceiling and they sat to the side (motor side of harp) and just moved it back and forth in the pattern desired. It was totally amazing--if you are ever near Stover Mo, check it out(nice quilt shop too).