Newbie purchase questions

Care taken by the previous owner is tough to fake, especially considering most dealers won't invest the time and money on a thorough cleaning until the rig is sold. Water damage is probably the biggest concern, and sometimes VERY hard to detect. Staining, spongy floors...And unless you're very lucky and have the most thorough dealership ever, unnoticed things will likely pop up anyway. Like the mouse nest and holes in one of my furnace ducts, under the fridge, where nobody could see them. I only figured it out because one duct didn't seem to blow, and I noticed paper towel shreds in the outlet!