Hello Bigger Pockets!
I'm a long time podcast-listener and longer time dentist located in Cincy, OH.  This coronavirus thing confirms my more recent suspicions that my career isn't perhaps as robust as I initially th...

No body was opening their wallet.

Then we are going to feel MUCH better about trying to help them.The unfortunate part is that Tenant's of all kinds (some of which are Landlords TOO) smell free stuff and they start grabbing for it.

They have more manpower(bodies) and are doing it every day so they are gonna be able to work faster. 

. - Put down a copper slag infill to help reduce the pet order smell and future cleanliness.- If you go with concrete pavers, install a solid 4"-6" of road-bock base, don't cut corners on the foundation, it will save you in the long run.

The smell is a strong mix of chlorine and oranges , much better than before . 

From now on you will smell BS a mile away and know that you are the only one you can count on not to screw you.  

The house smelled heavenly. 

If they move out and you discover the smell, charge them for the cleaning and deodorizing.

Unless the existing system is near a body of water and pollutes a lot.Maybe connecting to the existing sewer would be cheaper anyways assuming that you can and its economically feasible.