In construction there's a rule, measure twice, cut once!

Do you have any suggestions on screening a prospective buyer, giving them the code to the lock box and taking measures ahead of time to discourage vandalism since no one representing me will be with them when they visit the property? 

Now, luck is nothing more than a measure of your effort and energy (read:  The harder I work the luckier I get).  

@Immanue SiberoCap Rate is only an information rate basically using the original sale price divide by the expected NOI, So is only a measure of Expected Return.

Some of these older gents lived through periods were interest rates were high and money was tough to get..Rules of thumb are always great to know, they give you a loose yardstick to measure by, just make sure that the rules of thumb are product specific, as always value add is much different then a stabilized deal, even if both are the same "type" of property.  

Use this straight line to calculate three measurements: right side to ceiling ( should be 0"), middle to ceiling and left side to ceiling.

As an RE investor - there is no bigger measure of success than to be able to live the life of freedom and on your own terms.  

While there's certainly always luck involved in any project, there are also a hundred other things that aren't luck that you measure, analyze and correct for in future projects.  

And 36 Other Key Financial Measures, Updated Edition by Frank Gallinelli.

Given that it’s one of the primary measures used to value an income stream, that’s no surprise.