You need to set a deadline for them to correct the issue, then follow up with an inspection or other method to confirm compliance.

. - which I suspect you're already inclined to do.You can also investigate various methods of pipe replacement / renewal that involve trenchless technologies, such as pipe lining, pipe bursting, or directional drilling.

that was not a method that Armando taught in the seminars I attended these were strickly how to find BRRR props and rehab them and then resell or refi and keep.. the Markets we worked were Vegas and Orlando and Frankly those investors who actually bought property doubled their money or more with the deals i funded for them and they bought on their own it was 2011 to 2013 which as we know was a prime buying time and had to hand it to Armando he picked two of the best Markets.. 

If you're looking for a great way to find off-market properties with less competition is by using a method called Driving for Dollars.

I was involved in R&D program with O.C. on "solving" a solar-on-the-roof solution that (a) worked and (b) was scalable. 

A common strategy used by investors, such as those operating through PadSplit, involves purchasing the property, completing basic rehab, refinancing, and then using cash for the interior build-out.Another potential red flag, even without converting common areas, is the addition of individual locks on bedroom doors.

You can sell on financial method because there is such short demand there is all but no comp's to use for comp method, and if selling as turn-key, yup, financial method will be your friend for sure. 

@Jonathan Cooper - Sounds like a short-tax year is involved.

What tools or processes have you implemented to estimate rehab costs more accurately and avoid scope creep in BRRRR projects?

Obviously if you’ve done this before you likely have a method you prefer for dealing with these types of things.