I’m not trying to give you shit here OP, you did what you did 4 years ago and you’re thinking of doing something about it now so it’s all good, but:
this is so astronomically expensive every penny saved is good…”
This is so astronomically expensive that I can’t imagine caring about 300 bucks to see if anything is horrifically wrong with it. Seriously folks, get an inspection if you’re buying a house! This would be like, I dunno, taking a job without talking to a single person who works there, except at least with the job you can quit without wasting thousands of dollars! The inspection could save your life!