You know, this sounds like a really bad idea...
I don't think it's wise to undergo this degree of surgery using local anesthesia alone. While I've done many procedures under local (such as scar revisions and excisions of moles, etc) and routinely perform breast reductions under local anesthesia with intravenous sedation or general anesthesia, I don't think that a breast reduction under local alone is advisable. There's just too much surgery (ie, cutting), risk of bleeding, too large an area to work on and, finally, most likely too much anxiety for you even if you could get reasonably good numbness (anesthesia!) of the surgical site.
I would not want to do or encourage that.
Sorry, but I hope that this helps, and good luck,