If so, how do they define primary residency?

This is great, but it is not a vaccine as we have defined vaccines for all of human history. 

These services are not running their own census.Depending on how you define neighborhood, even subscription services like co-star can only get down to submarket, but cannot get microscopic.They can help with rent comps and growth, since Costar owns apartments.com and Loopnet.  

I suggest first defining what market you want to invest in (if you have a preference). 

The fixed structure will depreciate at that rate, but often you can separate other parts of the property to be defined as "personal property" that depreciates on a much faster timeline. 

This shows total lack of budgeting and is a sign they will only fall further behind with more excuses.5) Have a defined eviction process, but allow 3-5 days of flexibility for inevitable slow-pays.6) Find handymen that live in an area only 1 Class higher than your property.

As you probably expect, the IRS defines “starting” very differently for the two types of real estate businesses.For rehabbers and wholesalers, you start your business when you first make an attempt to buy a deal.

Keep in mind that risk is defined by three elements, and the most misunderstood of the three is "what is the risk". 

Your property manager is going to have business systems in place, and a value system, more than likely you need to fit into their system than the other way around.After you define what is important to you maybe there is one out there that is a match.

I would definately do your research and try to analyze as many deals as possible.