Answer: In my experience, this is a very large tree to try to transplant on your own. The roots are fairly shallow on this tree, down maybe as deep as nine inches, but the are very wide spreading -- certainly much wider than the branch spread. The root ball will be very heavy and it may be advisable to prepare the tree ahead of time by root-pruning over the course of a year or so prior to digging it up.
I would suggest you consult on site with a professionally trained and ISA certified arborist for assistance. If moving it is out of the question, they may have suggestions on ways to prune it and how you can then maintain it at a size that can be managed where it is growing. I'm sorry I can't be more specific for you long distance.
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