Yes it is evolving and I wasn't exhaustive but my point was the OP has a different setup than an apartment or STR.   

After exhausting all avenues to cancel my policies with them, it finally took a letter threatening that I'd file a formal complaint with the state's Attorney General office to get them to cancel my policy. 

Law enforcement has advised that this could escalate into a dangerous situation, given the occupant's troubled history and strong resistance.I've exhausted all forms of communication, including texts, emails, and physical letters, but to no avail.

The fix the issue and installed a cleanout which was not thereBut- Was a big surprise They told me - the sewer pipes connect to a septic tank not to main sewer line without permit.

The bathroom count is too small for this number of bedrooms so I would plan to convert the ground floor half bath to a 3/4 by adding a shower and adding an additional full bathroom upstairs attached to the main bedroom, which could connect to the pipes. etc. for the existing bathroom.

Tenant agrees to comply with all duties required by Wyoming Statute §1-21-1204: maintain the Premises in clean and safe condition and not unreasonably burden any common area; dispose of all garbage and other waste; maintain all plumbing fixtures in a condition as sanitary as the fixtures permit; use all electrical, plumbing, sanitary, heating, and other facilities and appliances in a reasonable manner; prevent water pipes from freezing by turning off outside spigots, disconnecting hoses, and keeping the rental heated to at least 50 degrees; replace lightbulbs, air filters, water filters, and other consumables as needed; test smoke detectors every six months and replace batteries as needed; immediately notify Agent in writing of any defects or dangerous conditions Tenant becomes aware of; replace broken or cracked glass, no matter the circumstance of breakage, unless the Tenant provides Agent with a police report detailing breakage beyond the control of Tenant; pay to repair anything damaged by the Tenant, his guests or invitees, whether through intentional act or negligence; upon termination, remove all personal property and garbage either owned or placed on the Premises by Tenant and clean the Premises to the condition at the beginning of the AgreementCreate a policy and stick to it.

Unless I go back and reverse-engineer it from the date they secured the unit, often I lose track of where a particular building is in the turnover pipe.

I spent a lot of years driving junkers, mucking around in crawl spaces fooling with sewer pipes, and using my week or two's vacation from my "day" job to get rental properties rehabbed.

They'll essentially put a holey tube under the building, piped to the roof so the gas can pass through and escape without seeping into the building. 

I’ve exhausted the obvious competition and wondering if there are any out there who’ve come up with a creative solution or found some cheaper carriers?