Here's an article with things to consider when selecting a cost segregation company.

This is why most wholesalers are terrible because their numbers are never even close on the repair costs.

The adjustments you’re making—subtracting the old mortgage, adding exchange-related costs, and applying cost segregation percentages—are reasonable, but confirm with your CPA to ensure you're not missing any adjustments.

This can be very expensive and is usually the worst choice because you can't justify the cost.2.

. - I will DM you cost seg kevin's number. 

I am quite interested in this property for multiple reasons , but the math isnt working.

And are the DIY folks including the costs of their labor or are they only counting cost of materials?

I have a few cost estimate questions.

It sounds like the reason you wanted to do this was to achieve Real Estate Professional Status. 

A cost segregation study was performed on this apartment building in Knoxville, TN with a depreciable cost basis of $17,323,250.