Hello Kaz
He does have a sister that have a husband that is sick too.
He does not have friends but I have seen his handiman taking care of him such as taking him to the doctor , doing errands , taking care of the dogs etc…
Since my ex is well financially I have told my Brother (without my ex knowing that I suggested) to suggest a 24/7 care to have it as a companionship.
Have a good day and stay safe !
Thank you for help