ChristyFord wrote:
What are some things I need to pay particular attention to when looking at a used TT?
Everything, whether a private sale or from a dealer the owner is unlikely to disclose any serious issues they know of.
What things can I expect to/should replace (aside from tires)?
Certainly you'd want to have the bearings repacked and replaced if necessary. Again though, anything in a used trailer is fair game for failure and because there are no guarantees despite what the owner may claim you have to be prepared to deal with
any failure.
How do I clean out the fresh water tank (I'm assuming it doesn't detach)?
Same as we all do - maybe 1/4 to 1/3 cup of bleach in a gallon of water, pour that mix into the fresh water tank, fill the tank with water, turn the pump on to run water throughout the system, let it sit overnight, then drain & flush with fresh water. Many do drink water from the tank, we don't and instead use tank water for washing, showering, and flushing the toilet - any water we ingest we bring from home in a separate container.