Wrong, by 2030 there will be a lot less coastal area habitable in Hawaii: https://climate.hawaii.gov/hi-facts/sea-level-rise/

If you think the great lake region is too cold or wintery, well I got some bad and/or good news about what global warming is doing... it's not going to be frigid winters there for much longer.

There's this atmospheric event. It's called a hurricane. They hit Hawaii all the time. If these homes are not getting inundated with some of the storms that have hit the islands, they aren't going to get inundated any time soon by mere sea level rise. And you can always raise homes.