I already had no success in trying to reach the appraiser, which I am sure was intentional on the appraiser's part.Like Kenny Rogers says, "gotta know when to fold 'em!"

welcome to the fold @Brandon C.J.

@Jocelyne Sema Wishing you success ten fold!

For example:The reason STRs are frowned upon are two fold.  

In the first year my income increased five fold.

Thank you in advance for your ideas or feedback (e.g. know when to fold 'em).  

Welcome to the fold!

My wife a retired school teacher is a master with fan folded card stock (think grade book) for the rent roll.  

@David Ripplinger you have some good comments above but the crux here is 2 fold: appraisal calculations and rehab cost calculations.So if you can calculate those with 2%, that's a reasonable tolerance. 

Having said that, I graduated with A piece of paper that says I graduatedA huge network of alumni who are all in the same business as I am (architects, GC's, subs, developers, suppliers, etc)A technical knowledge of the business (Enough to keep me out of trouble, and to know when to consult an attorney, engineer, architect, or more often than not, a veteran tradesman)The network I developed is worth ten-fold the cost of the degree.