I try to focus on the policy or behavior, not the party or ideology promoting it.

. :-)One place had 9 dogs kept inside, goats penned on the porches, goats in a horse trailer and birds caged in the garage.

If I were a tenant and my landlord drives by every day unannounced I think I would feel uncomfortable.I understand the need to keep an eye on your property.The tenants also want to be left alone, if you live nearby and walk your dogs and it's your daily route, OK. 

Since he is your cousin, you might want to consider giving him an opportunity to correct his behavior.

They could've charged me for dog food and I would not have even realized it!

For that reason I think it's more critical for you than others to do whatever you can to stand out (ex: EV charger, arcade games, amazing photos, allowing dogs, etc.).

Professional and competent behavior is required to run a business."

Isn't there some kind of documentation for actual dog if it is a true service animal?

The fenced yard is a positive for small children (no added value) and dog owners ($50 month added value). 

Its more specialized of an area of law and you shouldn't let the formation of the LLC become the tail that's wagging the dog.