Long one sorry. Not technically fil before I get told off but dp and I have been together for almost 20 years so near enough.
Fil had a bad fall this week, was just able to contact dp after a night spent on a concrete floor. Ambulance arranged, dp rushes over of course. Fil is kept in hospital dp goes to his house to get bits and basically it’s a state.
We went back today planning to give it a scrub and it’s even worse than we thought, there is no heating, no hot water (gas was cut off some years ago due to oxygen tanks being in the house and has never been reinstated) mildew on the walls (no doubt not helped by the lack of heating) stuff everywhere.
The stairs carpet is dangerous, but there is a bedroom and bathroom downstairs so he could relocate down there if we can clear the mess.
I don’t know where to start, our house is tiny, the kids have all got rotten colds and he’s classed as vulnerable for corona anyway so he can’t come here. I cleared his living room today and then made a start on the kitchen where I discovered the lack of hot water...
The taps are leaky in both bathroom and kitchen, I think there’s a problem with the electrics some of the plug sockets are working and he’s rigged a light in the kitchen as the ceiling light isn’t working. The windows look like they blown, I could go on...
I’m rambling a bit here but I can’t believe he’s been living like this 
we see him often but he always comes here or at the dcs sports. We’ve also discovered he’s burnt through his savings and is being partially supported by his brother. Honestly knew none of this - he avoids questions if he doesn’t like them and will lie to suit we actually spoke to the brother today and it’s all come out.
The house is owned outright (we think, starting to get concerned there’s more stuff we don’t know) realistically I think he should sell and move into a flat preferably or something needed less upkeep, the house has been in the family since new (50’s) but not updated since (I would guess) the 70s/80s. Of course this can’t have come at a worse time with all the virus stuff too.
He’s only 69 (I don’t even think of that as elderly) and very much a head in sand person but we can’t leave him like this. I think he’ll be sent home tomorrow and o don’t know what to do!