After looking it appears it may cost $200 to $400 for the many dual wedge setups, bunk end fans, exterior porch light, stove lights. I bailed and just use led lanterns, or 12volt plug in LED.
I decided to just buy some exterior campsite add ons this year instead. New purchases: Coleman stovetop/grill, Coleman coffee pot, and wallyworld cooking heavy duty folding table.
Campsite cooking setup now has a coleman skillet, celano grill, coleman exponent folding kitchen, and above added.
Moved all cooking/coffee, food prep to the campsite off the grid/propane. No use of range hood/interior lights, toaster, and screw the single serve keurig.
Inside of ours is packed with dumb lab laying at feet, no room to cook/prep, and kids going nuts.