For bathrooms, a walk in bath - they are much cheaper if you order them from England than the Irish version. I can't remember which company we ordered from, but even with the stg100 pallet delivery charge to Tullamore, the bath worked out eur1000 cheaper than the same model delivered in Ireland. The only problem was the difference in size of the drain fitting, so you may want to talk to a plumber first.
For the toilets, side handles are a good idea, but try and make sure that the toilet is accessible from the side, as this makes, ahem, nursing care easier (so the handles should fold back to the wall).
In the kitchen, I have a friend who is wheelchair bound and he got his stove-top and main worktop fitted to a hydraulic system - basically the whole thing could be lowered down to wheelchair level or used at normal height.
Also a kettle on gimbals (like a sailors one) prevents scalding, but it does mean it has to be filled with a jug as it's locked in place.
In the bedroom, a bed that is is possible to get out of without bending your knees over 90 degrees is a good idea, as thigh power often goes.
Remember, you (or some other able bodied person) may be doing things like meals, stay-overs etc. do try and design things that are usable for both the fit and the decrepit.
Also, if you are thinking of putting one of those emergency call buttons in some of the rooms and you have children - they are irresistible to toddlers! A big red Fr. Dougal don't touch this button moment.