I've stayed at the Hacienda many times over the years. On each trip, I've spent time with Alfonso Cuesta. A very interesting man. He was a pilot that would land his plane right on the beach in town. Took his family in the plane on vacations around Mexico. The last time I met him he was building a neighborhood in the desert outside town with just the help of one other person. Took us (myself and traveling companions) out to see it.
Unfortunately, from his son, I learned he died a few years ago at more than 90 years old. I'll miss him.
Found this reference to him and the hotel in the book "Baja Legends" by Greg Niemann.
Read excerpt here: hacienda_hotel.pdf