Steve,
We just completed a job on a house like the one you described. We put a sub panel on the second floor, and wired down from the attic.
The first floor we wired up from the basement. The house had a mix of wall board and lath and plaster, deadman and cross supports all over the frame, none of these were in our way. The only rough part was removing floor boards from the attic, we had to be careful not to crack the ceiling below.
We reinstalled the floor with screws, not nails, it worked well. We did not make our 8 % mark-up, because we were the low bidder, $9700, plus permit fees. After we completed
the job the owner treated us to a nice dinner, and showed us the other bids. $12,000 and 14,500. I think the next time we will try T&M. Steve try the up and down method, it went well except the attic floor.
