Hey Dr. Jay, congrats on the scholarship. I wish that UMB would give me that kind of money - I'd definitely study a lot harder
Anyway, I think tuition+fees (for the entire year) is ~24-25K, so you will need to take out some Federal Staffords. Also, cost-of-living is relatively low for a city, but it is still a city, and there are some "nicer" areas that rival DC in terms of rent costs. You said that your fiancee will possibly be attending HU? Then it might be advisable to live somewhere in between, like Columbia (still fairly expensive), or somewhere else along the 95 corridor (unless she's cool with living in Baltimore City and commuting all the way down to HU every day.) Rent/mortgage will make probably the most significant part of your non-school-related costs.
To give you an idea of what I spend in a month, my mortgage is about $1300, and then everything else (including car insurance, all of my utilities, grocery spending, entertainment, gas, travel, etc.) goes on my Visa card. My monthly charges are usually in the $700-800 range, although some months are worse (e.g. around Christmas time, or when I first bought my house and was buying stuff left and right to help furnish it). Keep in mind that I get reimbursed each month by my roommate, usually around $700 (rent + utilities). So I try to keep my spending below $1400/month. Over 9 months of school, that's $12,600. Pretty manageable. I was able to take out only Staffords (they will give you up to $8,500 subsidized and $30,000 unsubsidized).
Now, I plan on making some money this summer while working to cover my mortgage/living expenses. The surplus that I will have from summer employment (if any), plus whatever is left from my Staffords, will go to two places:
#1) A emergency bank account, to keep me prepared in the event something catastrophic happens to my house, car, or family.
#2) Straight back to Uncle Sam. I'm not hanging on to excess I don't need at 6.8%. I'm going to pay the interest plus whatever I feel comfortable NOT having in #1, and hopefully I'll be able to gauge my borrowing better for next year.
As it is, for this year, I wasn't too far off the mark. I suggest that you draft a couple of budgets and start thinking about what you're going to have to spend (take into account things like commuting, your car, food, insurance, little things like that, because they add up), and take out the minimum amount of Staffords that you can. Don't UNDERborrow - I think it's better to err on the side of caution, and it's always a good idea to have an emergency fund (especially if you own a house and/or car).
I love this subject (obviously), so if you want to talk about it any more, PM me.