If you haven't done so, you may want to get an estimate for a cost segregation study on these units.

Quote from @Michael Belz: Now, I have two options: I could fix and flip it with an estimated $200K rehab for an ARV (After Repair Value) of $825K, having purchased it for $465K. 

Here are some numbers: Current PITI: $3,970Estimated rent: $4500-$5000 (there are several homes within 4 blocks of mine that owners have turned into rentals and I've been able to compare online pics to our home, so I am confident this is a good estimate)Sq ft: 1790Estimated sale price today: 1150000-1250000Mortgage balance: 612,000I would self manage. 

@Vikash NandConsider books like “The Book on Estimating Rehab Costs” by J.

This way we know its a good chance they should qualify before wasting any of our time showing units. 

The larger unit will have higher maintenance/cap ex even with coastal environments being harsh on some items.I suspect your expense estimates are far too low especially if you kept the BP calculator default percentages.  

Also there could be a good chance the borrower files BK if they are still alive.

The estimated cost to finish the basement is around $25,000, with an additional $24,000 needed to complete the rest of the property.

I suspect a legal, permitted garage conversion ADU will cost ~6 times your estimate if hands off and probably at least 4 times your estimate if you do the finishes yourself.  

Does BNB Calc show the lifetime of the properties revenue or is it an estimate of what it could make or is it showing the last 12 months of revenue?