@Khalid Haynes Life is not predictable like you described. 

Hi @Mike Loop, IF you have multiple exterior doors on the property the cost effect of this might answer the question for you, but assuming you only have a front door:As long as a handle AND some sort of manual securing method (like the latches or chains that are only useable when you are inside the home) this would/should/could be a non-issue.There's no predicting people's fear and thoughts around safety sometimes, but this should create a reality in which they are able to be certain they are safe when they are in the home.

It’s a predictable progression (excluding the standard government intervention in what otherwise should be free market economics).

Back in 2008, after watching my stock portfolio plummet and lose a large portion of value (none of the money managers predicted the collapse, even though nonprofessional friends of mine did) I decided to diversify and take the responsibility for my future.

Also he predicted the FED will never raise interest rates.

I like boring and predictable. 

I was planning to buy more rentals, and time management is hard to predict as I self manage, and I could be working at real estate full times when 3 or more vacancies occur simultaneously.

Once I have the potential rehab costs estimated, how can I best predict the added value to the property from it?

You'll find Columbus to be a generally more expensive market with wild appreciation...you will find more value in Cleveland, but the general tradeoff is the stability and appreciation of the market.Columbus will be one of the 10 biggest cities in the county within 10-years...it's 14 now...and there is no sign of slowing...my standing prediction is it eclipses Chicago in 50-years, but we'll see.

ARV is also challenging if not impossible for a third-party to predict due to market changes, investor design choices, listing agent competence, photography, access, even just keeping the damn place clean for showings, etc. etc. etc. and on forever with countless micro-decisions that will affect the end result.