This combined with Ozone treatment should do the trick.Good luck and try not to get stoned!

In my 50+ years of renting to people with pets, the pets have not done any severe damage, just carpet/floor damage, if any, and usually carpet cleaning with pet treatment is sufficient. 

We loaned him our machine and a 12 hour treatment took care of the problem.Magic!

She was in some psychiatric treatment facility.

I also tried it on my friends place who had a tenant that smoked and had pets and it completely made it smell normal (it took several overnight treatments at the 12 hour timer) plus I used it on a small house of mine that had a funk smell I was trying to get rented & it got rid of that in a couple hours.

Unless you are in an area where there is a specific demand for that type of unit (I've heard of someone doing well with this near a hospital, housing the families of people who travel from out of town for long term treatment) then I would pass on the furnishings.

Had to do flea treatments for carpets, nasty air filters they didn't replace, the new ones were still in the laundry room.

Probably need to do the heat treatment.

There are a few types of passive investments that qualify for 1031 exchange treatment but the options are limited.

Unless he has undergone treatment for, or somehow come out of, his depression/health issues then you'll likely be looking at this as an ongoing problem.