Slightly contrarian view here. What I would do is sell the house and business and buy a much smaller and more expensive house on the Southern California coast, some place with its own boat dock. Property taxes are pretty low in California, but you could buy expensive enough that the propery taxes would be about the same. No worries, you have planty of money. And you really don't need a house too big to even clean by yourself. You would probably be spending less time in your house when it is 72 degrees in February, and your sailboat is calling.
Another vote for CA! Thanks to Prop. 13, property taxes are capped at 1.125% of purchase price, with tight restrictions on annual increases. The longer you own, the lower the tax % becomes. Another option is to buy a house in, say, Palm Springs/Palm Desert and then grab a condo near the beach in North County San Diego. You could AirBnB whichever one you're not using, if you wanted and pay your taxes from that. Mountains, oceans, good schools if you buy in the right place, and relatively low property taxes. Best of all, no snow! You're surrounded by mountains, so easy access to skiing, hiking, etc, but you don't have to shovel or slog through cold, heavy white stuff. CA traffic can suck, and gas is expensive, but you won't care because you won't be commuting.
FWIW, taxes on my $1.3M house are about $11.5k, but it "only" has 2600 sf. No basement, but the 1050 sf attached garage is nice consolation.
As to your daughter, what kid doesn't want to move to California? As long as you move before HS, she'll be fine.