Hi there,
I had my BA 4 weeks ago, it is my second one. Is there no way at all that you can stay over because trust me, you will NOT feel like moving. It’s not painful at all, you will just be very, very stiff. When you stay in overnight, it is not just to make more money from you, the nurse comes in every 2-3 hours to check your temperature and give you pain relief if needed. If, God forbid, you were at home and something happened, you may be in trouble.
Those first 24 hours after a general aneasthetic are quite serious, if you can, then stay the night.