if it's not too late, here's what i did.
I needed to hand quilt a California King quilt. and being unemployed, wasn't able to afford much, so I went to the lumber yard, (hardware store, anywhere you can get lumber cut) and got 4 1X2 inch pieces of wood cut 6 feet. i bought 4 "C" clamps, and VOILA', a 6 ft squared quilt frame.
I hung it from the ceiling, you can also prop it on 4 dining room chair backs, just make sure you fold up towels or something to cushion the chair back with so you don't scratch the chairs.