google lolDebt service coverage ratio (DSCR): The DSCR is a financial metric that compares the property's net operating income (NOI) to the loan payments.

However, I've had a very difficult time finding any insurance carriers that will provide this type of coverage. 

In light of these circumstances, I'm seeking advice on the best financing options to address this costly project if insurance coverage falls short.

If a better state for landlord, maybe see if you can find a different insurance coverage and/or if tenant will pay difference in premium to cover, then require high liability in renter’s policy.

Very few contractors carry professsional liability/errors and ommissions coverage which is what MAY be beneficial given your fact pattern.

Looking for someone that will provide the necessary coverage for our duplex at a reasonable price.Any other tips/recommendations for a first time house hacker are welcome(:

If your mother is an insured under an owner's policy, check the continuation of coverage provision under the Terms and Conditions section. 

It will help you when you are pricing your coverage. 

They increased the coverage amount, changed from ACV to ARV.

For your fixer needing conditional coverage post-close:Specialty Insurers: High-risk flexibility.Surplus Line Insurers: Non-standard risks.FAIR Plans: State-mandated option(last resort)