1. The cost of moving a home, doesn't really matter as to a couple of miles, or 90 miles. The largest portion of a move is the tear down and set up at the new site. This figure will be similar in each case. I would suggest that you check with movers at the end location. They will be more familiar with the county code situation at the set up site, and this will speed up the process.
2. Sure this will work, if it will save 100,000, but think about this further, Why isn't everybody in Arizona doing this? Why are the dealers not doing this and making an extra 100,000 ?