If I pay the manager 10%, and am still paying for repairs, etc. as they arise, I'm not really in an advantageous financial position.  

Your hard costs start with your $2100 mortgage, but you may have some other costs such as any utilities provided by the municipality (commonly garbage or sewer but sometimes others).

A TIC is a property that you own as a tenant-in-common with other owners. 

I don’t find that to be common practice.

You make the all-too-common mistake of assuming a property manager charges 10% to collect rent and brings nothing else of value.

It's way too common for Landlords to get too comfortable and chummy with the renter/handyman.

So, while they are not a common form of valuation tool for single families, you can technically estimate one.  

I thought I would give it a try and see what discussion will arise from a topic that is not common to this forum.As an Architectural Engineer that lives and breathes construction, I would like to see if investors know much about sustainability as a building practice.

As far as income requirements, we use total household income which is pretty common. 

Have a plan B & C for that scenario..One questions though, Is the loan interest only for the whole ten years or is it only for a year, then principal kicks in (this is common).