There is no borders in this quilt, it's a pieced design that I would not be able to split easily for any kind of QAYG method. I was thinking of doing something like Jaiade suggested, so I'm happy she can confirm it may work.
I would happily rent some time on a larger set up if I could, be alas there is none closer than 3h drive :-( I'm not doing king size very often. It's for a friend. I start a quilt for her, she waited forever for it, and now she is changing her bed to a king size. Would love to be able to accomodate her need.