You should also figure out how much additional rent you can get for the space. 

It looks very interesting.Best of luck getting started and let me know if you have more questions. 

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. 

I plan to utilize some cash, margin loan, 401k loan, and a HELOC as a down payment.My first house hack (now an out of state investment) has a Zestimate of $530K, and I have $266K left on the loan.

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.

Quote from @Jinxiang Xu: New to being a landlord, and already forked out $20k for foundation repair on this rental house.

A lot of your returns come at the time of sale. 

Breaking news: events in and out of our control will affect real estate both positively and negatively.

Of course my nosey self had to go look up your rental property.

Swathi Welcome to Bigger Pockets !!