You might want to look at tile caching projects which might make the initial tile-generation take less time in exchange for only pre-rendering some tiles. (Perhaps less important in your situation but would be beneficial when you want to cover a larger area.)
I had a quick look at some options, this might work with your set up: http://tilestache.org/
You might want to look at tile caching projects which might make the initial tile-generation take less time in exchange for only pre-rendering some tiles. (Perhaps less important in your situation but would be beneficial when you want to cover a larger area.)
I had a quick look at some options, this might work with your set up: http://tilestache.org/