I have a 14' long arm and can get up to 144" of backing onto my zippers. I can quilt up to 135" with this type of set up. Ask at local guilds and I'm sure they could put you I in touch with someone who has a similar setup. What you've saved on doing the smaller quilts on your own frame will balance out the cost of having someone else do this one. you've put a lot of time and money into your project already having someone finish it who has a big enough frame would be worth it IMHO.
