Congratulations on your heroic success on your debt! Every day amazing people, like you, share their success. Thank you.
Way to get all grown up with a new Vanguard account. That is where we keep our stash too.
Regarding your OP situation: Are there other options for your husband's 403b? Some districts have a variety of options and some allow you to suggest or bring in other choices, like Vanguard, to the teacher 403b choice list. That is what we did.
Also, it is easy to transfer your money to Vanguard, as in your IRA, or, if your husband is able to switch to V. Call the Vanguard concierge service (800-750-1520) while you are online and they will walk you through the process quickly. You will see the forms on your screen shortly after they create them; they are excellent. Don't ask TIAA to move it to Vanguard. Some companies create obstacles to individuals that they do not do with a Vanguard. Go to Bogleheads (
http://www.bogleheads.org/wiki/Bogleheads®_investing_start-up_kit) to find out what types of asset allocation to do for your portfolio. Andrew Tobias'
The Only Investment Guide You'll Ever Need and
The Bogleheads' Guide to Investing are excellent.
Best wishes.