Adult social worker here.
Does your mum have over the financial threshold? (£23,250)? It sounds like you already know that she would be self funding any care, so our ‘eligibility criteria’ - personal care, nutrition, etc are almost irrelevant because you aren’t asking them to find a package of care.
Some of the things that sprung to mind when I read your post were:
Hiring a personal assistant - someone who can act as a companion, help with social inclusion (take mum out), keep place clean, do some personal care as/when required.
I’m my area, we have ‘PA noticeboard’ where PA’s looking for work advertise, but you can put ads on job websites with what you are looking for.
The other thing maybe worth considering is sheltered accommodation, in my area we have a number of schemes from very low level support with some social activities, to higher level support with on site carers (but your own flat, so not a care home).
It is also worth contacting the sensory impairment team in your local adult social care, to see if there’s any additional equipment or support they can provide for her.
Happy to help further if you’d like any more advice, just PM me.