OPINIONS? YES! Make up a fairly detailed material list and price it, then if you can REALLY do it in 4 days, multiply your hourly rate by 32 and add it to the "selling price" of the materails, plus tax, and that is your number. WE do not know if the old wires will pull out of the conduits, or how much "knob and tube" will be replaced by Romex or EMC. Given the little bit we do know, I think my minimum would be about $6,000.00 with new switches and receptacles.