l am sorry to hear this - l expect he will be better at home away from risk of any hospital bugs. Can you get any carers in and even friends to help break up the day for him. l know you work - so it must be such a worry. Surely, the hospital will not discharge him unless he is on the mend - and of course wether he can manage at home on his own.
l watched the Queen and Prince Philip at the Diamond Thames Pageant - they stood for hours in the cold and damp - and l did wonder about how they managed without frequent trips to the loo. So l was not surprised when he was taken to hospital with bladder problems that evening. l can remember my elderly aunt telling me that the Queen Mum had a SPC for years -[Auntie had one as well]
ls there no way you can have a stair-lift - l have had mine for over 20yrs - l could not live without it.
You could ask the hospital fo the loan of a commode - or contact the Red Cross - they have all sorts of equipment that they loan out.
Can’t think of any other ideas - just wish l could do something to help you both.
All the best