Age UK should be able to point him in the right direction.
If he is on a low income, he may be entitled to Pension Credit, which is a gateway to many other financial concessions. He will need to supply a lot of financial information in order to claim.
As he needs care, he may be entitled to Attendance Allowance. The claim form is long and is best completed by someone with experience, eg Age UK, Citizens Advice or another charity, or welfare service.
If Social Services ( Elderly Care) are contacted for help, they will do both a care and a financial assessment.
All of these will involve the man revealing a lot of personal and financial information, though AA is not means-tested. Would he be open to this?
Is it possible he doesn’t actually need personal care as such ( ie help with bathing, dressing?) , but help with cooking, housework? He will probably have to pay for those.
But once awarded AA, nobody wants to know how it is spent.