The most we've ever had at one time was 228.
Now, we have much less (97 at last count - not counting babies), but most are much larger. We've kept 70 kinds of snakes, 15 kinds of turtles / tortoises and handfull of most everything else.
Currently upstairs, we have large display enclosures and fish tanks in our living room, a tortoise room and a general reptile room.
In the basement, we have 3 rooms in which we keep the large monitors, large caimen, big snapping turtle, box turtles as well as a seperate cold room for brumating colubrids in the winter.
We keep all of the boas and pythons at the Scales Zoo building, in large display enclosures.