Before you go, forget about the prices of property being lower, they are usually lower for a reason.
Despite the Yacht club the Island is quite poor.
Check all the things that are important to you and see how they are rated, if you need to visit hospitals regularly, check the ratings, it’s a bit of a faff having to get a ferry each time to go accross to the mainland. Do you like driving down small country lanes ? Do you mind lots of tourist clogging the roads during the holiday season? The cost of living is higher for example.
Check out Libraries, see how they are rated.
Oh and be prepared for lots of Gransnetters popping over to you for a long weekend!
If you go, I hope you will love it, I have fond memories of going accross the water for some holidays and days out when we lived in Southampton, but travelling there recently I wasn’t impressed.