It is difficult, but families need to be open about this stuff. My in-laws were good about this, they had a vacation home that only one of their 3 children wanted, they had given some monetary gifts to older grandchildren and great grandchildren that our kids didn't get because they were much younger at the time, so they worked out a plan they thought was fair and shared it with everyone to discuss and offer amendments. I'm sure we will have some things to consider as we get older, we gave one DD money for a wedding which the other 2 kids may never do.
I have one sister who has some mental health issues and has a hard time keeping a job. She has cut herself off from much of the family. When my mom died the rest of us siblings let her move into mom's condo rent-free if she paid the utilities and insurance. Covid actually helped her some, working from home meant conflict with co-workers was minimized so she could take on temp work. She is hard to deal with.