Take your time.
Bring a snack and take your time. Check everything, take breaks or even leave and go have a meal and come back with a fresh ideal of things to be checked. You can get side tracked on things being fixed and forget where you were in your list of things to check. Run lots of water in all sinks and shower, around shower wall. Things tend to leak slowly and a quick on/off with water will show you nothing. Be sure to check your seals around your storage doors. We didn't realize ours leaked until we got it home and washed it. Good luck and remember, you want to find all problems NOW, not later.