I will go with an open mind, but use the great insight I have gotten from everyone to evaluate the deal.

But to have a successful investment career needs a deep understanding of how to evaluate properties.

What are the best ways/websites to help with evaluating a buy and hold property? 

I think not...don't get hung up on the rules, treat them as guidelines on how to evaluate a property.2.

I believe the #1 item you have to look at when evaluating the rental property is to make sure you have positive cash flow, or at least set a minimum positive cash flow you're willing to accept.  

Nail down that investor criteria and then evaluate property through that lens and remain committed to your criteria!  

Get daily logs and documentation pictures.

When the adjuster evaluates your situation, they will evaluate it against that policy description.  

Though you are investing by purchasing the “paper” i.e. mortgage, the physical real estate is very important when evaluating a potential investment in a non-performing mortgage.

Turnaround is slower for you,  GC may not be available in quick fashion,  you may need to compromise and get less experienced /sloppy GC,  you don't have them to evaluate true rehab estimates before deal closes,  etc..