Wiring: NM-B (Romex, etc) is somewhat faster than metallic conduit. Drywall: Roto Zip or similar tools. DeWalt makes a tool that installs collated drywall scr

Wiring: NM-B (Romex, etc) is somewhat faster than metallic conduit. Drywall: Roto Zip or similar tools. DeWalt makes a tool that installs collated drywall screws, but I’ve never seen one in use. Insulation: older houses generally have extremely poor insulation, so a labor comparison is a bit odd. But there are several spray-applied insulation products on the market. In a moderate climate, a whole house can be insulated in a day or two. (Spray foam is very expensive, so mineral wool or fiberglass can be less expensive despite potentially higher labor costs.). In cold climates, exterior insulation may be needed, which is a whole different process. Sprinklers: PEX fire sprinklers are a thing. I’m not sure they are widely used.