I don't have much more to add but was wondering about puppy daycare. If there is such a place near you he could go there while you are at work. He'll get to socialize with other dogs, and get lot's of exercise, won't be bored or lonely and can't destroy your house. Should be tuckered out by the time you pick him up. Wouldn't have to be forever, just unitl he get's out of the little monster faze. When it's time to stop taking him slowly leave him at home for short periods of time or perhaps by then he'll be fine with being in a crate.
I don't know if there is a min age for such places, as I have never used one, just going by what I have heard.
"An animal's eyes have the power to speak a great language." ~ Martin Buber
"All of the animals except for man know that the principle business of life is to enjoy it." ~ Samuel Butler
"The purity of a person's heart can be quickly measured by how they regard animals" ~ Anonymous