We were prepared to offer her like 1k to move out but when she found out that we now owned the condo, she had her son move her out the next day cause my guy in Pitt helped find her a new spot. 

They build followings by convincing people like yourself that real estate ownership is a prerequisite for success, then provide tools that can cause significant financial harm when used by people who are not in a position to manage the risk. 

Tenants do stupid things and you don't want eat off during winter and burst pipes causing thousands of dollars in damages you have to try and chase tenants to pay.

Is there a specific threshold for rate-of-change in that relationship that will cause you to change your keep vs. hold stance?

With all that said, determining a good scope of work is one part of the entire process when analyzing deals, but many do not factor in increased holding costs, don't actually know how much some things will cost, miss things and causes many to freak out a little more than need.When analyzing deals, one should factor in their profit and the entire scope of work (plus extra, to include holding costs for how long the project will be) from the ARV before coming to their max allowable offer.

And even then, the x factors can cause it to be a disaster so even if the project is good on paper this is still very EXECUTION DEPENDENT. 

For that matter, plenty of people who share a lease eventually establish their household systems but it's unhealthy- and everyone can't wait for the lease to end.I love your priorities, so I'll respond to each how a complete household system and a property management that does some sort of CPM tha supports this system serves these essential PM priorities:1) The Right People: a complete household system attracts the right people and repels the people that would cause problems (even if they have clean records). 2) Minimize Vacancy/TO: a complete household system is one where people want to move in and stay there for years and years, rather than merely stay there until they can afford to do otherwise. 

We deal with a lot of OOS investor in our Detroit market, for many of them we have to fix disasters their initial "team" caused.

Will it cause housing values to tank?  

An experienced investor who is well-capitalized can deal with the issue and continue making payments, without harming the seller or their credit.