Yes Sophie, let her sleep.
It works out really well because as you walk in our front door you are in the downstairs living area. It has 2 bedrooms, entertaining lounge bar and kitchen area, toilet, bathroom and laundry BUT my son also has one of the rooms down there so PLEASE macrobug, don't enter the wrong room.
PLUS it means that you really don't have to try and get upstairs at all - do you?