Consider all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

We currently use a simplisafe system to monitor the driveway to audit how many guests enter and if they bring pets.

@Victor Nguyen for starting out either is fine if the numbers work, but if you do a duplex I would recommend starting with the a side-by-side duplex the first time you do one rather than a multi-floor building.The reason being is that managing multis (duplexes) with tenants living over each other come with different problems such as noise complaints, and can limit your options accepting pets.

The service animal is considered “part” of the tenant, which is why you can charge extra, like a pet.

or actually allow pets to run inside the house?

Now we are pet friendly, so no issues.

There is a 10 year waiting list to get a voucher, so in my experience the tenant isn't likely to muck it up with unauthorized pets, guests, etcYou can eliminate 3x rent since the applicant will have a voucher.  

One of my biggest pet peeves with AirBnB and VRBO is having to click through dozens of ads to try to figure out what they are actually charging.I shouldn't need a spreadsheet to try to figure out the prices.

Be wary of taking your dogs for hikes near there as it is spread via fleas, and you'll need to keep other pets contained. 

BP should definitely create a therapy group because I equally fall into that trap with some of our Chicago renovations...I went to a property to do a quick walkthrough check and then somehow I end up with a broom in my hand cleaning because messy job sites are my pet peeve.