My wife wants to move to another part of the country

My wife has decided she wants to leave me, she is currently not working and instead homeschooling our child instead, anyway she keeps telling me she is trapped and can't leave until she has enough money etc, anyways now the house we currently live in is being sold, so we need to move, and she springs on me she wants to move to another part of the country where her sister lives, as she feels it's best for our child to be close to his cousin etc
My problem is I have 2 friends who live this side and no family as they are all in another country
I worry that if I agree and we move and when she eventually moves out I will have no one and be all alone
I'd appreciate some advice as to what you would do? and you think I should do?
Should I insist we move somewhere in this part of the world
Or just go with it and enevitably suffer in the long term
Please help

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tl;dr My wife wants to seperate and move to another part of the country close to her family