I need to add / rewire outlets in existing drywall in two bedroom walls. I have origionated the circuit from below (basement) at one end. The attic does not have much clearance at the top of the wall either. The problem is continuing them along the outside walls horizontally with minimal intrusion and or patching / demolition. The wallls are about 10 feet long X 2. Im adding 3 outlets per wall one exists already in each wall that will be replaced also some data and phone cabling. I have located the studs with magnets (nails) and the exterior is brick making outside a no go. The outlest are going normal height above the baseboard. There are about 7 wall cavities per wall and the corner to continue through.