Billing them each much may be time consuming

I don't find it very time-consuming so long as you have everything in place.

Very few of the post-recession consumer protections apply to commercial financing, so this isn't a crazy test to see if someone is violating their fiduciary duty to you the borrower that you've stumbled onto here, OP and Mr Otteson. 

This is the most time-consuming part because employers and apartment complexes are not in a big hurry to call back.

You can "drive for dollars" and send out mailers to property owners, but that is time consuming, and may involve a cash offer to get the deal done. 

I agree with most of what you are saying as real estate cannot automate as much of the due diligence that can be done in say, unsecured consumer lending.  

Making it virtually illegal to use coal to fire a power plant has killed the number one consumer of coal. 

Please advise on if this is doable as what I have read all forms of real estate business is a time consuming job.ThxSam

The brick might need to be tuck pointed again which is time consuming and you have to make sure the brick has proper weeping drainage when it was installed.

Hvac energy consumes about 40% of your utility bill (typically) based on seasons.