I would check out ball point marketing and true ink marketing, which are companies that provide hand written letters that are written by robots. 

But what if you purchase with alternate financing (sub to, assumable (look at VA but requires OO), owner financing, etc) and only did buy, rehab, rent, and repeat (one less R - more precisely not a refi but maybe use 2nd or heloc)?

run the numbers if you snow ball one at a time and see how that plays out once it free and clear if you get there quicker ?

I HIGHLY RECOMMEND HAVING A GC WALK the property with you...if the thought is even crossing your mind then the answer is yes.Up here in Chicago we charge a fee of $197 to walk properties a provide a page report with ball park estimation.With contractors especially you get what you pay for, so find SOMEONE WHO KNOWS THEIR TIME IS WORTH SOMETHING! 

To be more precise, Denver’s STR policy applies to the entire City and County, not just downtown.

A lot of coaches (if they're good) should be able to shorten the learning curve for you individually, by understanding precisely where you're at and tailoring a plan for you... but ultimately, I wouldn't lose sight of the fact that you'll still have to put in the time and get your own first-hand experience with it - that's where the real, tangible learning happens.

I have never come close, nowhere in the ball park of losing cash flow.

Instead of the precise address, you can describe the general location or neighborhood where the property is located. 

My rehab cost crystal ball is broken; I intentionally broke it 20 years ago.

If only I had a crystal ball!