But, my answers are based on my actual experience being a real estate investor for the last 12+ years.I am 41 years old and currently own 160 units.

is it based on hardware or just software that allows you to remotely access/ control the hvac?

It's all relative and subject to change based on each individual person.

Buying & selling it as land, no development.Perhaps what I have covers all the bases I am looking for. 

Freddie has similar intricacies, but also does not require a two year history of receipt; https://guide.freddiemac.com/app/guide/section/5306.4If you can use the rental income to drive the DTI down so that you can reduce the down payment similar to that of the FHA product, the benefits of the conventional option will outweigh the FHA option, as I'm assuming you have a strong FICO based on rate quoted with no points.  

• Is it all just customizable based on what works best?

Pro tip--make sure your exhaust fan in the bathroom is vented to the atmosphere--meaning out to the outside.....go out the roof or out the side of the unit or secured to an opening in a soffit vent grille off the house. 

In Texas we do not have real estate sales taxes but property taxes are high and also included in the proforma based on the 90 day holding period.4.

Just by having those two traits they are in the top 25%, based on my experience. 

I’ve been manually scouring Zillow/MLS for deals, but it’s time-consuming, and I’d love to streamline this.2.Has anyone experimented with using machine learning models (like classifiers or regression models) to rate properties based on their condition from MLS listing photos?