Why not send to nursing home and let the pros to handle?

Explaination of benefits are needed. It's the best for both sides. 24hrs with staffs monitoring is way better and safer, you won't be able to do that. If you do, your bio clock will get severely messed up.

bear the weight, guilt and plight within. Not everybody is rich and can afford luxuries.

Just make more time to visit them often. When with them tell them stories and happenings with your life and family so they won't feel disconnected.

Get the family together with the old folks when they are still alive and able.

No point doing big hu ha ceremony after they are not around and only write long ass poems for the internet to see.