Not really a Visa issue but this may be the best place to ask around. For us immigrants, what do you have planned for when your parents get old?
Will you bring them here? If not and if they need someone, how do you imagine to balance between you going back taking care of them and your career/family?
There are legal hurdles: unless you are a citizen and can sponsor parents, the most they can live with you is 6 months every year. As parents age, traveling every year becomes difficult for them.
Even if you are a citizen, they may not want to move at such a late stage in life leaving behind their social life.
Financial: health insurance is too expensive. Most parents don't qualify for Medicaid.
Moving back comes with its own set of issues. Finding opportunities in the city they live in can be tough. If you have a family, then they may not want to relocate.
Unfortunately, many in Indian society look down on retirement homes and see it as some sort of betrayal by the child. In my personal opinion, a really good retirement home can be a great option. They get to mingle with people their own age and most importantly, have immediate access to medical help.