I live just north of the Delaware border. Property taxes are not bad and there is no sales tax. Currently they offer huge kick backs for people who install solar.
Downside: the school systems generally stinks, anyone who can afford it at all moves or puts their kids in private or parochial. They're working on it, but they've been saying that for years.
Other big downside: cancer capital of the country. It has been a chemical capital for over a hundred years. There are some really cool museums though, if you're there try to get to Hagley I love it there and it sounds like you and hubby would find it interesting. Currently, they took two major employment hits, both auto plants and the only refinery closed. While some view that as a victory, it is a small state and those three alone (before you count ancillary businesses) is almost 5000 jobs lost.
Right over the border in PA the taxes shoot way up, but then so do the school scores and SATs......
Chester County PA has some great farmland, but it is getting real gentrified and expensive..... Potential for lots of clients for your DH though.