Sharing your goals can help others provide more specific advice! 

The Detailed Engineering Cost Estimate Approach is typically used for the purchase of used property.SURVEY OR LETTER APPROACHOnce a site inspection has been completed and all components of a property have been determined, your specialist will send a survey or letter to the contractors or subcontractors to request they provide the cost of each of the items.

Hiring a lawyer sounds expensive, but it is way cheaper than hiring a amateur (in this case yourself) who costs you money and provides no results (and then you need to hire a professional anyway).My personal philosophy is to "do it right, or do it twice" and its way cheaper to do it right once. 

Yes, I'm a Property Manager in the greater Phoenix area.We are a mid-size property manager, large enough to have great tools and support but small enough to provide personal service.

I merely provide good information and good answers. 

We aim to bring buildings and properties back to their heyday, at the same time providing affordable and middle income rental housing.

This benefit allows the owner’s estate or heirs to receive the property at a new, higher basis—reducing capital gains taxes if they choose to sell the property after inheriting it.In short, partial disposition allows tax deductions for retired property components during ownership, while the death step-up basis resets the property’s depreciated value, providing tax relief for heirs.

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!

Quote from @Marc Shin: Should i be providing disposable toothbrushes and extra toothpaste to guests? 

With all respect to AirDNA and the amazing data they provide for STR owners, their pricing tool is not on par with most tools available there.