I do not know the size of the house you are talking about, but it is not uncommon for widespread mold to depreciate a home value tens of thousands of dollars.

Its not uncommon for me to rent one of my units for 3-6 months at a time.

Even if you had put some money down, it's not uncommon for Sellers to change their mind before closing.

Depending on where the house is it is not uncommon to have some moisture in a raised foundation, as the temperature changes you may see some condensation, that is why there are usually some vents around the base of the foundation.

It's one of those uncommon/common Jewish last names.  

It is not uncommon for a GC to get your payments, not pay his subs and later disappear.

Finally, it’s not uncommon to perform a background check on sponsors and operators.

It would be very uncommon to pull permits for interior work in a private home where occupancy has already been granted.

Not uncommon now to see 60 days notice. 

If you save that money instead and house hack it is not uncommon to get 50% ROI (Craig Curelop describes his 80%+ return in his house hacking book).