Interest rates atm seem quite high so will ride this out a bit longer (and ratios will continue to improve over time.) 

It was built in the 2010s and located in an established neighborhood with convenient access to schools, amenities, and major transportation routes.

Seller financing rarely has access to the credit system.

Leverage technology early and put everything in the cloud, so you can access info wherever you are.Make sure to get properly licensed and obtain E&O Insurance.

Plan to make some tenant improvements to push rents closer to market rate for the area.

But your main killers; road access, water access, fire hydrants, flood plain, storm sewers, Storm ponds, road surface requirements, etc. 

Focus on optimizing the current fourplexes (improving rents, reducing expenses).

It was already generating steady income, and we were able to grow its revenue further by raising prices and improving operations in the wash & fold service, which led to better customer retention.Our SDE (Seller’s Discretionary Earnings) was about $77k annually.

That profit will increase over time and improve your return. 

-the attorneys quoting you $3k are NOT eviction attorneys and are basically charging you as they learn.Move forward with the eviction unless the tenant improves their attitude.