I always find that Beer Saturdays or Beer Sundays take much longer than anticipated. I'd say an entire 5-gallon bottling would take me 3 hours alone. The bulk of that time is washing, sanitizing and drying the bottles - as well as general cleanup. Doing an extract (assumed, correct me if i'm wrong!) wort would probably take me another 3-4 hours soup to nuts. Again, it's the prep and cleaning that drags out!
But yes, it is completely achievable. Last weekend my brother and I disassembled/cleanind 3 kegs, prepped 5gal worth of bottles, beer-lines the kegerator, then kegged about 10 gallone, bottled about 5 gallons and cleaned up - with the both of us it still took about 8-10 hours!!!!