Found this on youtube.

http://www.youtube.com/watch?v=YTmATK6VsR0

I'm sure these must be rentals. Hopefully they propped up those outdrives / outboards!

I've never rented a houseboat before. I would think the rental company would assist you in properly beaching or tying up the boats. Looks to me these people had no idea what they were doing, which is why you should never buy a former rental.