I did it 8 years back. Sold everything, brought some personal photos, paperwork etc. that's it... new house, new furniture, new life... you will love it.
strictly speaking you need ticket booked to leave the country when entering... In its not enforced generally, but there's a chance you may be unlucky. I've heard even at check-in people have had problems, but again it's rare.. but worth the risk?
why would you do that... use aircon sparingly.. get used to it. At the end of the day youl never adjust living in permanent aircon.. I use it at night and when I first came after a few weeks increased by a degree... then again after a few weeks etc.. I sleep now at 28c...below that I'm honestly freezing!