I don’t back you up.
You can set up a trust but at the age the OP is talking about it’s just as likely a council would consider it deprivation of assets and leave them to pay care home costs anyway despite spanking hundreds of pounds on a solicitor.
Set up a trust in your 50s - fine.
Set one up at the time you set up PoA for a pensioner and I doubt you’ll get away with it.
Isn't there a ten year rule as well?