Decades ago, having Grandma come to live with the younger generations was fairly common, and it often worked well. It did for my family. When my brother and I were teenagers and our little sister a toddler, our grandmother can to live with us. Grandma was crippled by rheumatoid arthritis and could no longer live alone. My parents built a house that would accommodate the different generations, with some privacy for all, and Grandma came to live with us. The home wasn't huge by today's standards, but it was nice and well designed for our needs. The arrangement worked.
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