Sure, it's probably a one-way migration. Once you go, you and all your kids will probably never come back. Not just because of the expense, but also the lack of the muscles necessary for 1G. You can grow your own food. Any Earth technology can be transplanted, so they would not be all that dependent on Earth. They would have plentiful energy because the moon gets more ensolation than Earth. Oxygen and Nitrogen (and also all the other minerals they need) from the lunar regolith. Water from polar ice deposits. The one thing they would need to import is Carbon. Probably not a lot of that in the lunar rocks. But I know some guys with lots of Carbon they want to get rid of cheap, nearby.
