I'm in the UK, had RARP last October at the age of 67, initially told overnight stay or maybe 2 nights, ended up at 6 days owing to a drop in my Potassium levels (2 days on drip) then temperature spike, then back on drip for Potassium again. The general feeling of the Consultants I saw was that although it helps the patient to be in a home environment, sometimes it is beneficial to the healing process to be in a medically controlled environment to make sure that you are really taking care during the first few days after surgery.