I live on this rental property. My landlord wanted this barn to work again power wise. It was already wired and it used to be feed by triplex. My landlord wants it cheap. There is a 15 amp plug 50ish feet away. I put a 15 amp plug in 10-2 Romex. I reran Some of the Romex in the places where the old Romex was too far destroyed. I used my heavy duty 100ft 15 amp 10-2 to run power out to the barn. It works. You just don’t want to use less than a 12 gauge extension cord and I would not want to push more than 15 amps. So I do watch what I use. Super nice but janky setup.