Yep...pretty much. Unless you get 2 or 3 snakes all at the same time, so their quarantine is all the same duration, and you don't have to start the clock over when you add another pet.
That's what we did in our rental. We had snakes in R's room, my room and the livingroom, but had to keep the heat up for them. Luckily the house was only about 900 ft2. Now, in our new home, the snakes are in the smallest bedroom (except Petey as the acrylic tank won't fit thru the door). So I can keep the HOUSE cooler, and the snake room is warm enough. To quarantine, with the room being so small, just being on the opposite wall isn't enough. I've got to use a space heater for my room, and put the new snake(s) there.