Disclaimer: I've only ever dealt extensively with houses that were a maximum of about 50 years old (built mid-1960s). 

I didn't spend and extensive amount of time with it.

The mortgage officer needs the estimate by the contractor that will perform the work once the loan is closed.  

I do out of state investing and am competent in understanding how to get financing, how to build a rehab team which consists of people on the ground that perform due diligence, contractors, realtors, wholesalers and stagers.  

maybe have them send you pictures of before and after to back up the work performed, I don't know too many people that don't have a cel phone.Use technology whenever possible 

We had a new roof installed and new gutters in 2012, replaced and repaired plumbing stacks/pipes that failed and have done extensive tuck pointing.

Here @ BiggerPockets.com, Brandon Turner has also mentioned you could call the bank and explain to them that this is a 'performing note' and maybe that would help call them off but wondering if anyone has dealt with similar situations?

If there's already an auction date, you wouldn't have time for a specific performance action anyway.  

What you are looking for is a real estate savvy CPA who can also talk about nexus rules and potentially perform a nexus study for you.

In 2012, at the suggestion of my financial advisor, I picked up a couple rental properties in Highlands Ranch and they've performed quite well.