The travellers I know moved into council housing back in the 1970’s, which they went on to buy in the 1990’s. They were self employed roofers and builders, and they employed their kids who would eventually inherit the businesses. Those still living in caravans have their own land, they are spotless and tidy, and the trailers are static and have their own indoor pluming (including toilets). Those who live in their houses, are also super clean and tidy. Oh and they do pay their taxes, that I know.