Also the nature of the current "access" -- whether it has been hostile or permissive.The good news is the title insurance carrier has allowed the claim and will likely pursue an agreement with the necessary property owners OR fight the legal battle if necessary.

Additionally, all odors and smells now permeate the entire house, for good or for bad, and the same goes for moisture, grease, etc.

I dont suspect any intentional foul play here, apparently he is a doctor and most likely is in control of the corporation but I need to make sure they arent trying to execute a prohibited transaction.  

I have a hot tub on a well.I have 3 filters inline on my water.My water does not smell like Sulphur either.

When I started, deposits covered a lot of issues and there was always a battle with the former tenants and complaints. 

Unless there's something that you think shows they knew about this and failed to disclose it, you'd have an uphill battle suing them I think. 

Cruise liner vs battle ship?

For the smell, buy an ozone machine off amazon (have the unit empty while it is running-same with upstairs if the airflow is connected).

And if the lender foreclosed on the property a few years ago, but still hasn't tried to sell it, then it could be because there's an issue with title, or perhaps there's a legal battle taking place with the previous owner.

^^^^This, and I’ll add you need to have a thesis for why an area will not only appreciate but appreciate enough to cover both losses and opportunity cost (I.E. stocks and bonds return money as well) I think too many people get caught fighting the last battle both in counting on a level of appreciation that was a historic anomaly & betting on markets that have already had their huge run, the most likely winners of the last market are likely to be quite different than the winners of this bull market.