Of course, being a champion procrastinator I waited until the last moment. The county, figuring I couldn't possibly be on time, started proceedings against me.
Being a cost estimator by trade (though in a different industry) I had an idea what it should cost. Local contractors bid about twice that and couldn't get the job done in time.
Found a Mexican contractor who came in right on budget, filed the permits, started the next day finished with a day to spare and filed the completion papers.
It was amazing to watch and easy to see how he could meet the price. He had exactly the right number and kind of workers and equipment arriving exactly on time. They worked hard and the moment they weren't needed they were gone to another job and the next group was in (all Mexican crew, of course).
A scheduling genius he was, but he did chase his backhoe operator off to do odd jobs for a while so he could run the backhoe, apparently he really digs riding that thing.