Complex sentence: After years of abandonment and decay, the cabin was restored in 1966 by Bill Goettl, a Phoenix air conditioning magnate, and was opened to the public as a free-of-charge museum.
Split into simpler sentences: After years of abandonment and decay, the cabin was restored in 1966 by Bill Goettl, a Phoenix air conditioning magnate. He opened it to the public as a free-of-charge museum.