I'm actually taking a vacation to Phoenix X on the Floribama line in June and part of the reason for that is to check out the property/area.

Most sensors need to be connected to wifi and checked on every once and a blue moon.Is the best move to mandate in the contract that the tenant maintain those connected sensors and connect them to the wifi they pay for?

As far as why it takes time to scale - the most common slow down I see is the time it takes to find the next property that checks all of the boxes to be a successful BRRR with numbers that will work. 

A downfall of this process is the lack of tenant screening (background, credit, eviction checks) as far as I'm aware of.

I’d start with checking on their compliance requirements.  

@Shubham Aggarwal I am not a100% positive, I would double check with your broker! 

I would check into Padsplit if your really interested in this type of approach.

You can vet them here by checking out the references on their profile page and actually talk directly to folks who have worked with them. 

Check out the Events tab at the top to find local and virtual meet ups.

S8 doesn't pay more for basements or even garages.You may want to check into that before wasting money on upgrades.Regarding what to do, do NOT do anything until you find an investment path that will exceed your current ROI.