I have a contract with an HVAC service to clean/check each HVAC system twice a year (typically at the beginning of both hot and cold weather); they also make certain those filters I leave tenants actually leave the box and end up in the return during these checks.Some Property Managers do monthly check ups: these tend to be done more in apartment complexes than SFH. 

You are smart and could build a team/system for any so it's choosing the one.

Are the mechanical system in stable condition?

Unfortunately, this is not  a home that I would expect to appreciate at all and its not in the best of areas (I've seen many people grading areas on this site, I'm not super familiar with the scoring system but I'd call this a D area). 

*markets usually don't just crash because they've gone up, there is usually a catalyst like some sort of stressor that is added to the system.

I am always searching more effective systems and/or patterns.

This marketing system would also cost an arm and a leg and likely not be the best for a new agent as they woulden't close enough deals. 

Good management is all about process and systems. 

Check with the department of buildings to see if they have the blueprints in their archive.

Plus Austin just passed a bond for Project Connect to create a more robust mass transit system which includes tunnels underneath downtown for rail.