You may thing you're buying a vacant lot, but it has $100,000 worth of junk to haul off, or that faded letter on the window when you get up close and personal says "dry cleaner". 

You would pull off the sheetrock, pull the insulation, dry everything out, treat the studs with a mold killer, then put it all back together.

Quote from @David Ramirez: Call remodeled comps in the area that has been bought and sold within a year Especially for this method, you can paste the addresses in propwire and look in the chain of title to see the last owner before it was sold after being fixed up.

Cold calling is only one marketing method.  

But hey its money whether its a living is another matter For the future I am switching to the buy it off the market and put it on the MLS with a realtor method.

You can earn honorable discounts and fees overtime by establishing mutually beneficial partnerships with one lender or broker but squeezing them dry for a lot of hard work and not equal pay isn't something I recommend making a strategy

I would consider doing vanilla long-term rentals, but I think I want to do the BRRRR method, as scaling will be a challenge for me without it, I feel.

Are there any practical methods for implementing usage-based billing without submetering?

The forum you posted in is about the BRRRR method. 

Hey Chad, there are different methods of appraisal.