They only communicate through chat and email.

The rehab expenses don't line up but they are not stealing, I would suggest having a zoom call or sit down with their PM or account manager to see what is not lining up and where you see issues compared to what they have on their sheet. 

A national buyer would review the BPO and maybe do some brief online research, but would not typically not know, as in your example, about the sewage issues or extent of interior rehab needed.

I just need to be pointed in the right direction because I get deals in my inbox from people I communicate with all over the country.

.⚠️ Beware of these red flags:🚨 Bad partners who don’t communicate or operate ethically🚨 Financial arrangements that don’t make sense🚨 Risk levels that are too high for the returnIf ANY of these ingredients are bad, walk away—even if the deal looks profitable on paper.🚀 Lesson: Part of a good deal is better than 100% of no deal, but 0% of a bad deal is better than any piece of a bad deal.Final ThoughtsToo many investors make the mistake of wanting 100% ownership and control—but they forget that it’s better to own part of a great deal than to own nothing at all.🏡 Real estate is a team sport—and the investors who understand this scale faster, learn more, and build more wealth.Discussion Questions for You:1️⃣ Have you ever walked away from a deal because you wanted 100% ownership?

Some piece of communication is missing.  

A copy of our current driver’s licenses (for both of us).Again, all the verifying documents have been submitted through Zillow, but now we are communicating with the wife via email (outside of Zillow).

If I were you I would get a good flavor from the tenants how they interacted with the previous owner, essentially, how they paid, how did they make repair/maintenance requests, when/why did the communicate with the owner, etc...

They refuse to get their payment processor on a call with me and amex to resolve the issue. 

They were very organized and good communicators.