The landlord may wish to have a pet interview to ensure that the breed of dog is not one that is not covered by his/her homeowners policy.

"Courage breeds action.

Are you implying that establishing a policy dealing specifically with Assistance Animals that contains reasonable restrictions (that do not include breed/weight) or reinforces other pre-existing House Rules such as those addressing noise (excessive barking), or odors emanating from a residence (pet waste), is not lawful?

Depends on how you see this property, low and slow rents breeds longevity.

The tax ramifications of raising livestock on leased land vs owned land will look different.Regardless of owned vs leased, livestock may be considered inventory (raised for sale), or depreciated based on use (kept for breeding or dairy). 

In my experience traditional property management firms are not an area of the industry that breeds excellence.

If they are breeding that is a different story but as long as they are fixed we are all good as long as everything else checks out.  

It breeds trust in the quality of the deal being made if the seller is willing to finance it.

Think - tenants with aggressive breed dogs running loose, junk in their yards, rough home appearances, way under market rents, etc...

Some people look at this as a pain for them when they have to make repairs BUT I think it also reminds the tenant that if they want to stay in the program they can't be growing weed or running a pit bull breeding operation indoors because they will get caught as well. - The rent really does come in every month on time like clockwork. - If you do this with a larger bedroom count home (like 4-5 bedrooms) you can make some good money.