If you're well off and the parents are not going to move until dead, then you can do a few things. Some renovations to the house including a lift might work.

If you're well off and the parents are not going to move until dead, then you can do a few things. Some renovations to the house including a lift might work. You probably want to look for replacements to the bathroom shower / tub (think walk in tub). Its amazing how much a bench in the tub/shower helps. Putting in some pull down cabinets in the kitchen would be good. Basically, look for spaces that are becoming inaccessible and fix what you can. At some point some service that does visits (nurse) is going to become a need if you cannot make it over there. Also, a security system with the elder care options is good. A mirror or similar exercise system (particularly with some competitive features) might be a good purchase.