The children can get a separate home for their parents that doesn't mean leaving them in old homes but it also doesn't mean living together at all times. Old homes are must in any area BUT what should be ideal is, parents having a separate homes and kids having a separate home. "Just girls" comeon! i as a young girl supported my mother and is still doing as an only kid while my dad who was so believing in his "sons" aka my step brothers is now suffering. Don't underestimate a child and gender is surely not required for taking care of your parents.
Maids are the solution. I never said that kids don't go to their parents, Children visit their parents all the time while the maid does the work. Most of these "joint systems" are the same. The guy does the work outside, wife works at home, they all neither love nor hate each others, its a painful neutral mood. Why not spend time with each other while someone can do the work for them?
People should prepare for their old age, when they are young but that doesn't mean having multiple kids. If someone is ill and is having problems while going to toilet etc, there is something called hospitals, nurses and maids. The child who might be an adult now, has a job, might be married and has kids. What about those rights? Islam says be good to your parents, not be a slave to them. This concept that "i gave birth to you and raised you so you have to be there for me" is not a right, its emotional blackmailing.