There might be other experiences you could market and refer your STR guests to, like rustic BBQ joints, a local brewery, and places with live country music.  

Ironically from my observation it’s the same clueless people who believe anonymity is somehow going to provide asset protection that are most reckless in their business.

What you are looking for is:1. what is the line made of - PVC preferred (newer), cast iron solid, clay would be a major concern2. are there trees in the front yard with roots growing into the line.

Is that the burners under a BBQ grill?

They are partying, drinking, playing loud music, burning their BBQ, smoking, and throwing up all over the carpet and couches. 

Just keep in mind that if it is an older house with cast iron pipes and you lift the foundation, those pipes are likely to break and need replacing - partial or a complete repipe. 

Literally got into RE while at a family BBQ about 15 years ago.

I may never buy a building with iron pipes again Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

I have several irons in the fire and do own/operate a property management company.

I also hate 100 year old cast iron stacks.