If the tenant has a service dog to help with anxiety, seizures, or something of that nature.

No seizure of personal assets, no wage garnishments and no personal bankruptcy from a lawsuit arising at one of your properties as long as the LLC is properly formed and maintained. 

For example, alert someone with epilepsy they're about to have a seizure, get between a vet with PTSD and other people if he/she starts to get stressed out, and of course, pick things up off the floor for those in wheelchairs, and seeing-eye dogs, etc.But, companion animals are not allowed to go everywhere with their owner.  

I buy from government auctions (govt used not seizure) at wholesale, drive it for 2-3 years, sale it for what I paid then rinse and repeat.

I do have a sister in law who uses Cannabis for seizures (successfully runs the biggest catering business around) and I have a friend who uses it for Rheumatoid Arthritis (and he's a Chiropractor.)

Lifelong PMI only is an issue for 3.5% FHA though, and those using FHA are limited (especially in Vegas) since a lot of places aren't FHA approved to begin with (condos complexes - which many who are buying with FHA are aiming for).With 5% or higher down the PMI drops off at 80% LTV automatically, but obviously in a place with appreciation worth talking about - you can just appraise out of it usually after 2 years, and some banks allow you to drop it even sooner with an appraisal.As for your cars, many on here would have a seizure and then proceed to curse you for owning cars that are so new and shiny. 

They may be medical alert dogs that warn their owners of impending diabetic crises, seizures, etc.

I actually have a disabled child with Autism who has a service animal that is Medical alert trained seizure response that was professionally trained over 3 years.

ConstitutionFourth Amendment - Search and SeizureThe right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.

The questions you brought up apply to service animals, as those animals are trained to perform a specific task or provide a service with guide dogs and seizure dogs likely being the most common.