The distributions and allocations on your K1 will dictate what is attributed to you. 

This is where I would focus, as these are the same attributes that attracted those responsible for the larger projects like the Bellweather District you mentioned in your initial post.With your budget I would recommend NW Philadelphia (Germantown and Mount Airy in particular).

the cash flow you are referring to, are you attributing that to the $900 difference between the PITI and the gross rents?

They don't tear things up, they don't party, rent is generally paid early, lots of positive attributes!!

And are there other factors that could be attributed to those defaults?

This opportunity doesn’t occur frequently but it takes these attributes to take advantage when they do.3 - Blind luck - do enough deals, the unique opportunity tends to present itself.  

Cost to Rent vs Own and Return to Work PoliciesThis can mostly be attributed to the massive increase in home prices, particularly from 2010 to today, making people opt to rent for longer, especially today in the elevated rate and home price environment making renting the substantially cheaper option, on top of historically low inventory to choose from.

Invoices go into the CC account the same as they would in the AP account and are attributed to the vendor who issues them.  

Refi after construction.These numbers consider only the portion of costs of the HEL attributable to the land purchase, not the payoff of the HELOC (which we took out to buy the Seaside condo).Cash In:                     $66,166 (Cash, 1 year of debt service of HEL, debt service of const. loan, furnishing)Amount Financed:      $548,000 (home equity loan + construction loan + closing costs)Total Cost of build:     $614,166ARV:                               $850,000 (or rather "after construction value")Refi                                $637,500 (75% of value + closing costs)                                        Cash Out                       $89,500New payment             $4500/month (54,000/year)Estimated Cash Flow (pre-tax numbers, so actual mileage may vary)airBNB year 1:            $70,000     (net income $16,000)airBNB year 2:            $100,000   (net income $46,000)airBNB year3+:           $120,000   (net income $66,000)ROI (construction year):    0ROI Year 1 of STR:              24.2% ROI Year 2 of STR:              69.5% ROI Year 3+ of STR:            99.7% Did I calculate these ROI numbers right? 

Yes, I have general expenses that are not attributable to a single property, like legal and accounting and home offices like you mentioned.