That reminds me of my first house. It was around the same sq footage but a barn in the winter. We rented it first and bought it and the first year, we lived in a camper in the yard while a I stripped the whole house to the studs. It was the beginning of a nightmare, it was built with odds and ends of construction debris. Random studding, some studs married pieces, no insulation, and odd lengths of Romex spliced and wrapped in electrical tape for wiring. The electric service was 60 amps and fuses. Only the roof framing was done right. Fortunately all of my friends are in the trades and we have always helped each other out. It was a lot of work but it didn't cost a lot and I made money on it when I sold it. This is why there's codes and inspections.