For me, I get an average of Four 42min episodes per Video DVD. I know Big Brother 2006 had nearly 86 daily shows, and then add the extra eviction shows. Expect to burn about 22 DVDs.
That would be much less if it was a Data DVD, which I think would be your best bet. I'd like to watch the season again, but I'm afraid I don't have that much time on my hands.