Have a very similar story with my mum. It has had to change for the sake of my family.
I laid out to myself what needed done for mum, did POA, sorted out banks billing etc, moved everything over to direct debit. Got a cleaner.
You need to figure out what can be done automatically/what he can do/what you are willing to do.
Re loneliness you mentioned supper clubs, was thinking also local sports clubs/befrienders/mens sheds/community stuff through the church.
Is he fit and well enough to come to you, might he be able to visit you once a week etc rather than you always going over?
I have shopped online for mum but also set specific tasks which probably sounds condescending but i wanted to boost her own confidence to sort things out herself.
Do you have other brothers sisters etc. Can they take on anything? He will have to taken to you being around and i appreciate it will be hard but do it now so he can start in the nice weather when we prefer enjoy getting out and about.
Do figure out as your little family how this is affecting you and what time you can devote to helping and stick to it. I do for my mum one day a week although that isnt always being there but getting shopping/sorting banking etc. I cannot justify anymore time away from my kids.
Wish you all the best, look at the elderly parents section on here too xxx