The doors aren't really a surprise. When the house was brought back up to level, that particular area was the most out of whack. The water heater is relatively new, but I think when the electrician rewired some things, perhaps that got cut off and the pilot light needs to be relit. I'm getting a licensed plumber out there first to make sure and then go from there.
Bottom line, the next housing venture I partake upon will be starting from scratch again like the barndo. And yes, I have plans to expand my real estate "empire". My long range goal there is the lake house for short term vacation rental and something in the future for long term rental. I've got lots of plans!