I sort of keep my emergency fund in a money market account in my Roth. (I say sort of because, as I'm self-employed, I also live on money I earned last year, which is its own emergency fund.) Anyway, ~$10k of my Roth is in a mm account as an emergency fund, just in case.
I think it's a good idea for you to do this. If you move, you can withdraw what you put in. But if you don't end up moving (or if you end up only needing a portion of that money), you can leave it alone. Since you won't get the chance to contribute this year's money in future years, and because that money is probably taxed at a very low rate, it makes sense to go ahead and do it that way.
I would just leave it in taxable. It is a very small amount of money and you must be in a low tax bracket.
That's why it makes sense for them to put it in a Roth. If they are taxed at a low rate, and don't end up using the money, by the time they're retired, it will morph into a nice little tax-free nest egg. On the other hand, if they put it in a taxable account and don't end up using the money, they've lost out forever on the opportunity to contribute this year's money.