The HVAC is dirt cheap at 3K considering its a total install (no existing components or duct work).

You clearly have a limited understanding of the subject matter, but since you seem eager to learn, allow me enlighten you...There are two potential fallacious components for the Appeal to Authority syllogism, only one of which must be met to incur the logical fallacy.

The two key components when prospecting via the mail is to get the prospect to read your message and cause them to take the action that you dictate.

when I was in your shoes I added a new build to rental component to my business. 

Nevertheless, this section is perhaps the most important component of the PPM because it outlines the factors that make the offering risky or speculative.

If you can't find something you are normally a post question away from your answer.Strength in numbers so networking is a key component as well.

A vapor barrier on an interior wall is unnecessary and actually acts to trap moisture in wall and degrade components. 

@Davinder HansFire separations are assemblies not just one of the components.  

Preventive Tips     - Regularly inspect and replace toilet components

The roof itself is depreciated.Structural repairs done as a component of the roof replacement project makes the whole project a capital improvement.