Very sorry to hear your news.
Social services have been very good with our olds. There is actually a lot of help available from home modification ( wet bathrooms, easier to use toilets, lifts as just three examples) then there is financial help possibly available though that maybe means tested. With that it is possible in The East Midlands to pay for weekly help e.g. help with showering from a same sex person every other day, cleaning of house once a week.
You may encounter "I don't want any of that sort of thing" responses as that generation are fiercly independent and don't want help or handouts. Persevere as there are also hidden benefits. Regular contact with the outside world, formal structure to each week and the visiting carers know who to contact if there is a change in the persons circumstances.
When things have settled down in a few weeks, spend some time with them and watch what they do. You will be surprised at little things you can change that will make a big big impact on their daily lives. Could be stuff like an Intercom phone, brass bell, moving a favourite chair into a different room.
You might also try talking your local help the aged or Red Cross for helpful advice. They often know of people selling stuff like buggies, electric lifting chairs and the like.
There is a wealth of help out there it really is just a matter of lining it up.
Keep positive, Good luck
varche