They are friendly tenants, They call us immediately when there is a problem, and every time either of us is over there, the house is very clean and there are no odors...

This is why starting a business with "no money, credit, or business experience/savvy whatsoever" is a (I really really want to use some foul language here) joke. 

You won't have to worry about getting smoke out of a home or odor filled carpets if you do this.5.

It took a long time to get the odor out of the building.I would advise not allowing a rabbit at all.

It was in so-so shape, but full of about 2-3 feet of trash and stuff in every room and there were some odors coming through the closed windows I didn't really want to think too much about. 

Running a foul of all kinds of local zoning laws is just the beginning.

Yesterday I went to the home to see the condition, there was no car on the driveway… I opened the main door to peep inside…looks like they still have lot of their stuff inside and I can smell bad odor; I just closed the door and returned back.

The urine will soak through carpeting and into the wood underneath and cause stains and odors.

Another issue seems to be the smell - very strong and toxic smelling, and I worry about the odor lingering.

Smoking not only leaves an unpleasant odor, but it can also pose significant risks.