I am not financially capable of continuing to throw money into this home and I don't know how I can somehow make this property beneficial.

If you anticipate a possible fight, it's best to do things properly from the start.Certified mail in itself is not a panacea, in fact IIRC most of the relevant statutes say first class (i.e., "regular") mail - but it has to be sent under certain timelines.

It was your first day at the Karate dojo and you entered signed up for the Mui Thai one on one mortal combat fight to the death...   

In the beginning since they don't know what your capable of it will be costly to use Hard Money.

My guess is, they con investors into $50,000 or more and spend it on their sub-par lavish lifestyles, making promises they can’t keep doing services they aren’t capable or legally able to perform.

The chances of them actually paying you the 15k without a major fight is slim.

What should I expect as far as timing where I will have the capability to make my next purchase.

Besides REI's question why they must report personal info to a crime-fighting agency when we contribute to the community with safe and affordable housing. 

I have a lender, I would work with the same law office as previously, I have an insurance agent, I would find a home inspector, I would coordinate with the lender on the assessment - I feel quite capable of managing all of that. 

Then you also need to underwrite the syndicator and their operational capabilities.