Dear Nancy, you want both! A Castle is a lot harder to clean as it has round turrets, so you can't get the vacuum into the corners.
They are a lot colder than a Palace and most have Dungeons.
Plus they have drawbridges and portcullis as well that need looking after.
Wait till part 3 of my Article and there is a smaller one that may suit your needs!
Super Hugs.
Love.
Neil.