Actually did this a lot with my dad after graduating college. The one thing I would recommend is getting a 5 gallon kit instead of those smaller 1-2 Mr. Beer things.
A lot of work and time (2-3 months) go into brewing and a gallon only makes like 9-10 bottles. If you're going to invest that much time you might as well have enough to share with others generously and have it last a little while Keep in mind you're not constantly "working" the whole time. Fermentation and bottling (carbonation) takes the majority of the time. The actual cooking/brewing should only take a couple hours initially.
Also, chances are you're going to enjoy doing this and upgrade anyway making that $25-40 kit a waste of money anyway. It's a lot of fun if you like doing things yourself and very gratifying at the end.
This is a small shop by my parents house that is awesome. I'd recommend this basic package they sell:
http://www.arborwine.com/beerkit.html
They also sell recipes and beer "kits" pre-packaged. The family that runs it is very informative and awesome. I'm sure if you ordered from them, any of the family members can help you out if you ever have questions or run into any issues.