According to Ramban Eretz Yisrael is the place for the mitzvot. In Chutz LaAretz they are just so we do not become rusty. Iy”H you will be able to visit, skype, telephone, etc. You can also appoint a shaliach. In fact, I have several friends whose parents made aliya after they did – even though their other siblings live in Galut.
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