Many a book would be needed to provide the methodologies of success and many do write them.

If this is in California, you plan to use super high end fixtures, and hire artisan contractors, with all permits and all issues accounted for, you're probably looking at about $400 per square foot.If this is in Atlanta, you plan to use the lowest end materials you can buy, hire day laborers, not pull permits and ignore any issues that are not purely cosmetic, you're probably looking at $10 per square foot.If you're somewhere in between, probably somewhere in between.Long story short, there's no way anybody will be able to tell you how much the renovation like this will cost without knowing specifically where you are, what type of contractors you plan to use, what level of materials you plan to use, and what the specific scope of work is.But, if you check out the BiggerPockets bookstore, they've got a great book on estimating rehab costs and the methodology that goes into figuring out how much it should cost.

If the median rent for the size for the property and the area will not allow for 20% - 25% cash flow then it is probably not the best investment.Hello Ben,I do not understand your methodology.

From a methodology standpoint, I would buy/rehab an empty property first first then choose to either Section 8 or rent to complete the BRRRR.

It's a solid methodology--see here for a 60 min overview and here for his free Udemy course. 

I see that with the "similar posts you may like" bar....some of them are ancient by most standards- so may or may not help, but there is zero reason to comment on them at that stage. 

My intention is to not initially increase the rent, make some improvements to the efficiency of their HVAC systems (go from ancient oil to high-efficiency gas) and, once I have the work done, increase the rent to compensate.

I use Scrum methodology for organization and a program like Wunderlist or Trello to keep track of my daily tasks, weekly goals. 

Quick update on this one.I've seen the property twice (couldn't see the downstairs apt the first time).My father in law is very concerned with the roof since it has multiple layers of shingles and Yankee gutters (built into the eaves).Both boilers are ancient as well.I'm feeling like this could become a money pit very quickly.

Hey GangCheck out some of the excellent demonstration videos both animation and live footage on ;"Trenchless Pipe Replacement" and/or"Pipe Bursting"Very informative,,,I do these type of jobs in So Calif so I can speak with some authority on the subject,,,Again my purpose is to strictly give good information and adviceI like Trenchless as opposed to "pipe lining" because with Trenchless youre actually getting seamless New Pipe and Johns Manville guarantees the stuff 99 years.You can drive a Mack truck over it and it returns to shape.With Lining all youre doing is creating a fiberglass liner inside the original "ancient" clay pipe cracks and all .Hope this helpsDD in L.A.