Use sites like Bigge­rPockets for study.

As part of the tax documents I received from Capital Square, they included cost segregation study for each property.  

We decided to take 2 weeks to study the market to see if there were multi family properties or single family properties with multi family potential even available in our price range.We found a duplex in the roseville area that we are very excited about.

Have you looked into cost segregation studies, bonus depreciation, 179D, historical tax credits, etc.?

It appears that the full building is a rental(business asset) which is therefore, eligible to benefit from the cost segregation study.

@Forest Wu Here's an article with additional FAQs on cost segregation studies that you may find helpful.

Therefore, it seems this would be specific to the assets you have in your property.So a one size fits all percentage would be impossible to come up with.If people could put a percentage for the bonus depreciation there would be no need to complete the cost seg study.

To thrive, begin by studying the nearby real estate market, grasping property values, rental rates, and vacancy rates.

Some of my favorite area codes are 27107 and 27127. 27127 is a big area code so you really need to study it to make sure it’s not a problem area. 27107 is the outskirts of Winston Salem where you will find more houses in neighborhood/family type of areas.

But real education takes real time, study, effort, and desire.