Does anyone know of an individual or company that would co sign with a stranger (me)?

The state the property is located in, homeowners' insurance policy, and whether you rented as an LLC or individual all make a difference.

How about the individual who took a social media guru course and now believes there are sellers lining up willing to accept terms seasoned real estate investors have never seen in their lifetime. 

I called my local Probate Court and the Court Clerk but they had no idea what I was talking about or where and why this information would be public and referred me to contact each individual estate.Has anyone utillized a Lead source online for probates that is reliable?

You can do everything from strategizing your incomes together or individually and loans jointly or loans borrowed jointly to maximize the 10 total financed properties.

If a cash out refinance, many lenders will allow the cash out to satisfy the reserves requirement.DSCR lenders generally let you vest either individually or as an LLC.

I think BRRRR can still work really well under 2 conditions: 1) you have another substantial source of income and your capital is somewhat renewable (I don't) or 2) you're willing to compromise on your target areas and move to secondary, tertiary, or out of state markets (I am not) or 3)  you're very lucky and/or skilled at acquisitions (I am from time to time).  

We don't actively seek talent from other brokerages and instead focus on training individuals from scratch.

So, they would want to know if there was a substantial decline like that.I haven’t seen a change.

The goal is to identify undervalued properties, renovate them to high standards, and sell them for a substantial profit.