More can be found out on the IRS website The Cost Segregation Audit Techniques Guide3.

Avoid risk, which means do inspection and safety audits.

This cost is often justified by the value added through their expert advice, ensuring compliance, optimizing your tax return, and potentially saving you from costly mistakes.Audit Support: Another significant advantage of a CPA is their ability to represent you in the event of an IRS audit.

In an audit, you’d need whatever info they demand.  

But since the IRS can look back up to 7 years for an audit, that's not really helpful, and the IRS is also rumored to not be satisfied with spreadsheet downloads.

It's a budget friendly option to some of the other services, and they have engineers on staff + audit defense, but the more expensive cost seg companies ($1500-2500) will actually do walkthroughs of your property via Facetime to more granularly estimate components of your structure. 

This actually might be illegal of your CPA to suggest since they can't do/suggest things for the primary purpose of manipulating the audit regime of the IRS as it violates our code of ethics.

Have free energy audit done by your electric company5.  

The three tests outlined above are applied annually, so you may qualify as a real estate professional in one year and not in other tax years.It is also very important to document material participation.To meet the requirements of real estate professional status, it’s essential to keep detailed records of activities and time spent working on the properties so you can verify your real estate professional status in the event the IRS decides to audit your return.For example, you may keep a contemporaneous appointment book, calendar, or narrative summary of the time spent performing real estate activities.

While using a QCD may encourage the Clerk to accept the deed for recording it won't help if the DOR decides to audit the information provided with the conveyance.