Recommend me the best houseboat

Hello, I'm new here can someone recommend to me the best family houseboat I'm looking to buying it for my vacations.

What is your price range?
$40,000 to $240,000 and up can get you in a houseboat.
Do you want new or used.
How many do you want to sleep.
There can be two births or 4 births.
What waters do you plan to travel.
These will assist in answering your question.