It really depends how "available" you want that money and what risk you are willing to assume. From your description, (and assuming you don't have consumer debts?) it sounds like you want that money pretty available and that will be your only monetary source for a little while. I would recommend trying to accurately estimate your living expenses until February (since I theory you'll still have expenses in January before your DH gets paid), and keep that in an account like a high yield savings account that you can easily pull from. If you have money left over, you may look into some bonds or other funds, or even a CD that you can park, but still access fairly easily.
If you are willing to assume more risk, there are other options, but from your description I'd probably stay conservative so as not to stress during your transition.