I don't know hoe you can successfully home machine a quilt with high loft batting. I believe you are inviting grief and frustration. Even trying to quilt such a large quilt on the machine with limited space will be a chore. There will always be quilters who have successfully been able to do it. Take stock of your ability to do it with the limitations you have which are natural with your situation. One point tho is ..and this is based on my reading...high loft batting in a quilt is nearly impossible to quilt on a home machine. Replacing with lower loft is easier but if you have only 9inches space on your machine then. a king is also difficult....this is rambling but my point is look at your situation and consider how you might do it with the equipment you have.