Yo Fred...was thinking about this some more.
Without seeing the tree in person....it sounds like a big one - maybe making this re-location idea not very practical - especially given the wrong time of the year to transplant.
So...another thought would be maybe you could cut off the part of the tree that's lying down and a new one would sprout up from the old stump. You'd still have your tree without the transplanting hassle. I used the word hassle because without the right equipment and under certain circumstances....it indeed is a hassle.
Feel free to post a pic when you get a minute. It would help those of us in the peanut gallery...