I think you are experiencing the...".What is being hidden from me" syndrome which is akin to buyer remorse, but happens before the purchase. I remember thinking, WHAT AM I MISSING? This place cannot be as it appears. What's the hitch? Where's the scam?
Eleven years later, I am still thinking how lucky we were to find this place.
Hope your healthy skepticism is allayed.
(There is a house on our street for sale. I think it is far enough down, we wouldn't get any of your cigar smoke.)