If the restaurant has been dormant for awhile the grease can harden up inside the trap and block the lines.

Follow this link for a bunch of tipshttps://www.biggerpockets.com/forums/52/topics/68041-how-do-you-harden-your-rentals

@Keith Harden I dig a TON of digging online, and finally chose Rockwell Institute to complete my online courses.

Harden your properties to prevent unnecessary damage.  

It hardens up pretty well and resists scratching from furniture better.

But I suppose in very hot markets there could be full/partial EM hardening on day 1?

So for example I'm very conservative and don't want any debt on them because I feel this hardens them in case of a severe recession.

Combining with rubber risers to harden the common areas.

If the addendum was well written and agreed to, about type of dog, etc. and the house was 'hardened' enough to handle a dog, you may benefit from the additional cashflow (I would charge a deposit that at the very least covered a professional carpet cleaning from a highly ranked cleaner and extra rent money every month).To me, tenants are like employees.

The "Goo" then hardens and keeps the slab at height (for a while), because it's tree roots and soil conditions that make the cement move.Sometimes they drill hole to inject it, sometimes they come at it from the side.It's FAST..you can look it up on the web (see YouTube).For the Mockups I use GIMP....it's like Photoshop with less features, but enough to get the job done.There is a learning curve to it.