New to printing a few Q's about humidity/enclosures

Hey, so I got an Ender 3 Pro a few months back, it has been great, now my wife would prefer it in the garage especially with overnight prints. I have a few questions.

  1. I live in the Southeast of the US, hot and humid. What do I need to do to protect against that?
  2. Is the solution an enclosure?
  3. Does the enclosure need to be airtight?
  4. What do you suggest as less expensive way to procure an enclosure?