Wow - hope you have a castle to install this in. Depending on how high the frame is, I would hazard (assuming you are not also talking sidelights) that you are in the $500 range minimum, and possibly closer to $1000 with the electrical move and assuming this is an overheight as well as overwidth door - and that assumes the door frame AND header will fit in the available headroom. If this is an overheight door and you have a standard height (7 foot) entry ceiling, then it can get tricky - sometimes requiring a steel header beam or an engineered or laminated plywood header built into the wall from the outside at the second story floor level rather than below it like normal - and that can get you into the $1000+ range pretty fast. I have seen vastly oversized (7-9' high door 4-6 feet wide, or double doors) with sidelights run into the $2000 range for installation, Plus the thousand+ for the door itself. And of course, if you have concrete or brick or steel outer wall construction, that can bump the cost too.
