No idea about Wales but my Late MiL lived in Scotland. She had been in Hospital for various issues plus she had Dementia, at that stage it wasn't bad but she did need help. As soon as we could we drove up to Scotland from the South of England as both of us were still working.
The Hospital told us they would be discharging her into Family care.
So my DH and I, asked why were they discharging her into Hampshire's care.
They assumed we were local, and a forgone conclusion we would help.
Through my job I do have some knowledge about continued care, so told them it was impossible for us to keep driving almost daily for around 10 hours there and 10 hours back, she needed and was entitled to a Care Package, everybody is.
They had to put one into place, they had no other choice.
Speaking from experience with my Mum you can not do Care with out some support, especially 2 people, SS need to be involved. It might cost but it's worth it, for your own sanity.