Looking for a $5k to 10k river boat

[Time2Dune]

Looking for a $5k to 10k river boat, I haven't had a boat in a long time and said I would never have one again but... 

I'm looking for something not to fancy ( obviously with the price range ) just something i can pull the kids around on a tube and they can crawl all over it without me freaking out.

Im in north county San Diego, but don't mind driving for the right deal. 

Thanks