Any recommendations for ways of keeping ready for parent's health problems?

Thank you.
We have had the discussion, my cousin will be helping me out.
I live with my parents.
We have all important papers already put together in fire safe file boxes.

Nobody has a crystal ball but you are doing some good things. As cwillie, says -get the proper documents in place.

The other thing I would suggest is sit down with your parents and make a plan for the days, months and years ahead, considering various scenarios. Eventually you may not be able to care for both of them and still work from home. Ask them what their plans are if one or both should become incapacitated as from a stroke. What kind of care can they afford? In time they will decline - we all do. In time, you could become overwhelmed.

Do you live with them, or to you come in to help? It makes a difference for the time when they cannot be left alone.

There are lots of wonderful articles on this web site, you might want to start with asking your parents to begin thinking about POAs
https://www.agingcare.com/topics/55/power-of-attorney-poa/articles
Medical POAs
https://www.agingcare.com/topics/204/medical-poa/articles
and Advance Directives
https://www.agingcare.com/topics/217/advance-directive/articles