I believe after years of business experience that the system is more important than all other aspects.

I don't plan to ever sell it as it'll make a great rental when I'm done living in it years from now, but the excellent financial aspect of it's appreciation was pure luck of timing.

Can anyone suggest an alternative that can scale from tracking all aspects of a single rehab to X many at a time?

If it were legal work associated with the purchase of the property or negotiating some aspect of the property, then it would. 

It serves me no purpose as an investor, OTHER than having access to the confidential remarks on the local MLS. 

Study the following: price of homes with 2/3/4+ bedrooms, RENT for homes with 2/3/4+ bedrooms, days properties are on the market, difference in sales prices for MF & SF homes then start looking at the actual neighborhoods: crime rate, unemployment rate, wages, any growth aspects.

This is the same question you ask yourself when deciding on any aspect of your business.

He talks about a lot of aspects in real estate.

Also, by doing these recordings, you will force yourself to pay attention to every aspect and detail that might need attention, without really annoying the showing agent by slowing the viewing down too much.Lastly, go online and look for housing inspection check lists--there are dozens listed there, and then check for your local 'repair costs'. 

This works for us because we have some amazing employees who can do every aspect of a job minus HVAC and plumbing.