You will want to consult with a lawyer.In regards to your last two questions here's some background on what makes a contract valid and enforceable:Offer: A promise to do or not do something within a certain time period Acceptance: A clear and direct statement that all terms and responsibilities are accepted Consideration: A legal and adequate inducement given in exchange for the promise Capacity: The parties to the contract must have the legal capacity and competency to contract Awareness: A party must be aware of the contract Legality: The contract must be legal in the jurisdiction it will be operating in***Not legal advice*** Steps I would take: -Review contract in detail to understand each counterparties responsibilities (if you are not aware)- Email a copy of the lease to each of the tenants listed on the lease and reiterate lease expectations for termination notice, rent payment etc. - If the lease was signed via Docusign (other esign may have same ability) - you can go to the envelope, go to history and view the IP addresses for each action taken.

True, I am 100% with you on that.The point here is, when you analyze, you do based on what you know now (what is known as a fact today) and on what is highly likely to happened (again from today) and to accept the fact that things might change tommrow.Life happened every day, that’s why  we need to stay firm with our direction but flexible with our approach.having lived through the HORRORS of those years fully engrossed in the industry almost nationwide... it was regional on who did well and who had troubles.. no question well positioned landlords in Portland for instance no issue.. 

What is the minimum amount of profitability acceptable at a $60 million loan volume4.

If I accept the suggested pricing opportunities it could drop my rates by $100 / night in some cases. 

If you pay more, you won't meet your metrics and will probably have negative cashflow and/or equity.You may have to make 10, 20 or even 100 offers to get one accepted at the price that meets your numbers.This is what all investors did BEFORE the Great Real Estate Crash of 2008-2010.

The numbers no longer look nearly as good on these investments (now more like speculation) and I will now be forced to get my deposit back or accept this new price.

Hire an attorney and proceed with the eviction.In the future, I recommend you don't accept "landlord references" from friends or family members.

At some sales they will even accept payment the day of the sale during the auction if that property has not been sold yet. 

Is there a certain DTI ratio that you will usually consider acceptable for an applicant?

Progress is still not acceptable.