Unless it is a new build, and it comes with purchase warranties are an extra cost and may or may not even be executed when needed depending on the circumstances. 

An additional benefit of a detailed engineering-based Cost Segregation Study is that it can increase potential insurance premium savings as well as provide support for the property tax appeals process.

Quote from @Cody Caswell: Quote from @Bruce Woodruff: You're correct that getting every detail involved right from the start is critical!

Personally I'm working on a very exciting niche, but will take some time to pull together; and I'll give you more details as it moves ahead. 

.- extra storage space so tenants don't feel the need to squeeze their entire lives into one room (extra garage space, attic, detached shed)- room for 2 full refrigerators!

What about something like this: https://www.realtor.com/realestateandhomes-detail/182-Pineto...?

Verifying last 2 years of rental history and income extremely important to find the “best of the worst”.Make sure you understand the Class of properties you are looking at and the corresponding results to expect.The City of Detroit has 183 Neighborhoods we’ve analyzed.DM us if you’d like to discuss this logical approach in greater detail!

You can call suppliers, but may need very specific details to get a meaningful number.

I agree with Nathan (don't forget to price running extra water, sewer and electrical lines).  

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!