You still have to file (I think) for a few years after you renounce. If I recall correctly. It's definitely a whole BIG THING.
There are a couple of really good investment firms who literally have made a business for catering for US citizens in the UK. We work with one and it's well worth the slightly higher fees than a UK-only IFA would have. I use Tanager Wealth Management and would recommend them. They invest for US citizens in the UK only. That's literally their market.
So the article for the house.... a bit of something out of nothing.
First of all, you say you are nearing retirement, so I suspect that means you'll be buying outright and not taking out a mortgage. Even if you are taking a mortgage (do you know about the age restrictions in the UK with mortgages?), you could consider just using your husband's income and have him listed as the owner of the property.
Other options are not having the mortgage set up as Joint Tenancy but Tenants in Common, which decides the "ownership split" of the property.
As a USC, your first $250k of capital gains is tax free. And that's ONLY triggered during the SALE of the property. If you are choosing your "forever home", it's really not a concern. And the house would have to really skyrocket in value (more than $500k if you and your husband were both listed as the owners) before you would start to have any capital gain concerns. It really does give a lot of wiggle room. As you can see, if you were to list yourself as having 10% ownership in the house, it would take a MASSIVE gain for you to reach $250k as a capital gain.
Basically there are LOADS of us here who have UK property and are still USC and have just ensured we've put the right structure in place to eliminate the risk of US tax exposure.
Not trying to talk you out of renouncing, just letting you know there are work arounds and other options. That don't involve piles of legal paperwork, money, and a trip to the Embassy. All 3 are things I don't enjoy.