If you are going to do that, it will take a fair amount of work, probably including woodwork. It might be a more straight forward operation if you start with an active Epiphone. Those are getting harder to find now, but they are around. I personally hated the stock preamp and pickups, but all the routes and the battery box are there already. Picking one of those up for less than $1K and modifying it probably means you would have spent less than the price of entry for a Gibson.
I routinely see those in the $500-600 range.
