So sorry about your troubles. There are a few machines that are smaller than long-arms and their frames. Janome has the Horizon Memory Craft 7700 QCP. It is around $3000. It has a longer distance between needle and right side of machine. Also check out John Flynn and Margaret Hargrave online. She was one of the first to try home machine quilting of big quilts. John built a frame that rolls the quilt and can be used with a home machine.
I would move sewing desk away from wall and put the left side beside large table or tables so quilt can rest on table. To Change direction I leave needle down, raise foot and turn to new direction, adjust bulk of quilt, lower foot and sew again.
Good Luck.