Conventional lenders don't bother much with debt coverage because the bank makes the profit, but spreads the liability over to Fannie Mae, so who cares. 

Also if this is too big of snag out of the gate look at these options too with FHA203k and New Fannie Mae Renovation loan1.

That being said, speaking of loopholes, someone in my office once got GI Bill to fly for a Fannie Mae 5% down loan.

Read latest news from Freddie Mae they offered 5% down with 50% DTI !

https://nationalmortgageprofessional.com/news/fannie-mae-slashes-down-payment-requirements-multifamily-homes-5

Hello,   We are property preservation contractors who work in the field for Fannie Mae.  

Fannie Mae just announced last Friday they are bringing back 5% down conventional loan for duplxes, so sell it to someone who wants to move in and house hack!

Fannie Mae just allowed prospective homeowners-investors to purchase Multi Family Properties with as little as 5% downThis is a game changer on so many levels 1.

We successfully acquired a 30-unit building, implemented a re-leasing strategy, conducted unit renovations, and ultimately refinanced the property with the Fannie Mae Freddie Mac Small Balan Loan program for a profitable return within just 24 months.

I read an article recently about how Fannie Mae was increasing the LTV for 2-4 multifamily to 95% and the self-sufficiency rule would be eliminated.