How do they support themselves?
The ones I know either run their UK businesses from Poland or are under the age of retirement but have enough money never to work again Poland has very attractive low living costs.
Just for info something has changed to do with registering residency in Poland if you are Brit or European.
All you need to do is go to the local office that issues Dowots , give them your passport and tell them how long you intend to stay in Poland , 1 year two years or whatever, they then issue you with a Pesel , or if you pay them 15 zl they give you a piece of paper.
Used to have to go to the big city (Wroclaw) with lots of paper and bulshit bureaucracy now its easy , I think partly due to the millions of Ukrains that are registering here now.
I did my brit wife the other day, they weren't even interested in me being her Polish husband only the address she is living at.
I had to get a pesel for the wife so that I could cover her on my ZUS payments.
Now she can get a EKUZ for european travel post Brexit, great for us as we have plenty of pre-existing conditions that prevent us getting full private insurance cover if the brit ehic is not honoured due to hard brexit.
God bless Poland and all us Brits she now gives a safe European haven to.