It sounds like you are looking to scale and get into flips!

@Jim LynchSome typical minimum tenant screening requirements look like the following, but it depends on your market:-Renter has a gross monthly income of 3x more than the monthly rent-Minimum credit score of 650-Renter must have no prior evictions-No felons (or other notable criminal history)There are a number of different tenant screening softwares out there such as Zillow Rental Manager, TransUnion SmartMove, etc.Be sure to complete an employment verification by contacting the renter's employer and confirm the details they shared with you, landlord verification (if they have a previous landlord), credit check, and background check.

It seems like an uphill battle and I'm always putting out fires.

Just wondering if anyone had a property management company they used and liked in the MSP area?

Seems like I could possibly get a duplex with that kind of down payment. 

Without knowing all of your specifics, I'd say that it's only worth holding on to if you can reasonably expect to have some really good appreciation in the near future (like 5 yrs)....Or, in the case where it would run well as a vacation rental, you could switch the usage, maybe?

The only purpose of the account would be to collect payments and pay bills like taxes and insurance on assets held by the LLC.

What does the process look like from start to finish? 

I do not understand your remark as related to the DSCR loan.  2 ADUs are not allowed by f/f conventional financing but is not always enforced.Fortunately if you stay with the current tenant without a refi, by the time you pay principle it is likely the rent will have increased enough to absorb the increase mortgage payment. 

As a new investor, your best bet is to start small with an app like DealMachine or Propstream so you have direct control of your options.