What a cost segregation study does is it analyzes a property and breaks out the depreciable basis of the property to more than just building and land.It will try to identify assets that are eligible for 5, 7 or 15 year asset lifes which would be eligible for bonus depreciation.Whether a cost segregation study will help you depends on your tax situation.High level, it will help you in two situations1) Your rental property is active and you can offset the losses against other forms of income.2) You have a lot of passive income and you want to increase your passive losses to offset your passive income.Best of luck

Another bonus - the lease payments they'd receive prior are taxed at a lower rate than interest. 

A property I am putting an offer on tomorrow has an upstairs section I conservatively think I can get $1500 for (master bedroom + small bedroom OR bonus room for office), then two bedrooms downstairs for $1,000 each.

They are heartbreaking because he can be so generous and thoughtful and a hell of a lot of fun.

My family of 6 live and own in a ranch style 3br/2.5ba house with completed bonus room upstairs in a HOA neighboorhood.

We are so lucky to have this incredible resource and generous community of like-minded folks. 

I'm very happy for it and (bonus!)

But I don’t feel a need to disclose that upfront because I have a generous range, and can always be contacted to have it changed on a case by case basis.

The shed should be entered as an asset and deducted in full via bonus depreciation.

That's pretty generous considering they chose not to carry renter's insurance.