I likely purchased this property too quickly as it was the 4th property we toured and we didn't negotiate on asking price as the house was previously under contract and my agent advised against lowering.

We were forced to call police & provide them with a 'Cease & Desist' in an effort to stop the harassment.Our attorney has advised that we do not engage with them in any manner.

...I think companies like Norada would advise an investor not to accept $15,000 in future expenditures."

This is what I'm doing, not advising anyone to do this. 

Few of the ones I’ve looked at or did the phone calls with were new wealth advisers club, rei accelerator, pace morby etc

You should consider consulting an attorney.I've consulted an attorney, they usually like to handle the case in court and not advise on intricacies of how to negotiate a cash for keys arrangement. 

Readers are advised to seek professional advice.

A guru called this gator lending but I would strongly advise against borrowing funds for a down payment.

I live in Boston, but I was advised to start my real estate business elsewhere as Boston is very competitive.

Most people here are more conservative investors and would advise you just sell, but if you're set that the price will continue to rise, just sell a few days before closing.