I had one time the smart lock went out on a property due to extreme humidity getting in and frying the board (Yay Galveston weather!).

This way we skip the heat, humidity & hurricanes. 

"Because of the potential for moisture build-up and higher humidity in crawl spaces, you're most likely to find roaches, spiders, and termites in your home's crawl space.

I had an inspection before I brought it and they tested for humidity and thought there was a low risk of mold.

And in my house, which is maintained temperature and humidity.

It will come back.Once it come back it will produce new spores that will be viable (can grow) and will spread all over( disseminating) making it worst.Take a look at the area of the leak and inside the house and take the temperature on the lower part of the wall, the middle and the top, if the lower part is a lot cooler, there is humidity or maybe mold inside. just a hint.As per standard industry practice or code, a crawl space need to be sealed to control gases and humidity from the ground entering the house and ventilated, check with your local contractor or CODE Inspector from the city, every city have different codes.In conclusion, it is not the end of the world, everything is fixable, this will open the door for negotiation on your side, if you like have a mold assessor evaluate this and give you an estimate.

Lmao I had to comment “485 plants, which is over 6.”A few things to consider, if the seller pays code enforcement a grow house might have been excessively humid.

During the hot, humid summer days, that pipe sweats like crazy. 

Its 94 degrees and 55% humidity. 

I'd still be pretty careful.They're all 3 brutally hot, humid, and often dusty during the summer, but the 3-4 months of non-summer is actually quite nice.