Maybe the P trap under the sink is not filling with water correctly and allowing sewer gas to come back in.  

The issue I see is smart contracts/tokenized real estate and traditional real estate investors is like oil and water.

Pretty cool.You probably won't find this type of home in Florida or anywhere where the water table is high.

As a resident (who travels a lot) I would say the Midwest does not have the attractions like palm trees & beaches (the great lakes are cold) or amazing mountain ranges, which often come with some disadvantages like high cost of living or hut/humid weather, stroms etc. 

That would mean there is an approved site plan that includes roads, water, sewer, storm water, curb, gutter and any required buffers.

This is a beautiful house - rehabbed/looking new and fresh - walking distance to the water etc, yet low gross yield  compared to Byrd (???)

I can absolutely assist…I am a Full Time Realtor and RE Investor here in Ventura County.I help the full range of clients buyer, seller, renters, investors etc. 

If there are pets in the unit take a pan from under the sink and fill it with water so there's something to drink.

And what is your price range and are you looking for turn-key properties or something along the lines of a "fixer upper"?

I'd use an approved underlayment.Pro Tip: If it's cheap, it's not good.....at least spend in the moderate range.