He thinks that since the flange is not functioning properly the water is likely leaking underneath the bathroom floor. 

Thanks guys, very helpful for some confidence going forward@John-Michael Moreno not so comfortable with foreclosures right now, need to get my feet underneath me before getting fancy @James Mc Ree great advice, appreciated @John Thedford thanks for the input it really helpful to hear all of your experiences 

With 100 years water had plenty of time to flow all around and under the house, micro streams and variations is water retention in different soils will cause uneven settling.All in all you may have a real gem that just needs some love.  

Now that I have other properties with built up equity along with some money set aside, I'm at a junction on whether I raise the house and add another unit underneath or take the equity/cash saved and buy something else to add to my portfolio.

I want to post the sign on the concrete drive way, my idea is to put a pot with soil on drive way then stick the sing on it.

I have a seller that wants to sell, but the lot they had evaluated, in 2007, (it's 2 lots side by side), the health dept said the soil is unsuitable for a septic system.

Of course this soaked the soil in and around the foundation on that side of the house, and when the holes were left open, water then trickled into the holes.  

Similar to what Bonnie mentioned about baths, I would add that it says 'dedicated bathroom' underneath the photos which as a recent one month Airbnb booker, I was looking for, but then in the description it says shared bathroom. 

If too many layers on the roof then the property might not even meet county or county code compliance and not be insurable for a landlord property insurance policy.The core samples generally look at any underneath layers, insulation, and decking.

I know I am going to be ripping up the carpet and refinishing the hard wood underneath, painting and replacing the stove since the oven doesn't work.