They built millions of those 2 story 3k and 4k sq ft homes inland in CA with illegal alien labor. The poor slobs who bought them in the mid 90s etc didn’t figure out it was going to cost them 600++ per month just for electricity in the hot months just to make the habitable.
There is a large old mansion in my town, built by a doctor in the ‘20’s. It’s a beautiful house, brick with tile roof, high ceilings, porch, balcony, big detached garage, etc. It has changed hands many times in the last 50 years, usually because the owners couldn’t handle the utility bills. The owners usually end up living in a couple of rooms and closing off most of the house in hot summers and cold winters. At one time, it changed hands for about $25,000, other times it brought $300,000. A new doctor is in it now, we’ll see how he likes it.