Breast pump

Should i buy 2 breast pump - 1 at home, 1 portable or 1 breast pump that is also portable? Reason: I heard plenty of good reviews of a breast pump that is not quite portable and because I'm a working mom, I need one that is portable so that I can continue pumping when I go back to work. The price of the 2 breast pumps vs 1 breast pump is comparable/about the same.