I'm aware of those numbers, and I factored those in. Below is the full breakdown for an absolute worst case scenario and another where nothing horrible happens but it still underperforms.
Costs:
720k loan @ 3.75%
600k purchase, and then something not found in the inspection costs 120k to fix (very unreasonable)
6k closing
6k annual property taxes
$250/month insurance
7% repairs (again, collective worst case)
8% vacancy (very far above average)
7% CapEx
10% property management
$6212/month expenses
Income:
8 units, 2bed 1 bath
$400/room (average rent is over $500/room in the area)
$6400/month Income
Cashflow: $187/month. This is still positive, but absolutely terrible events.
Slight underperforming scenario:
600k Loan @ 3.75%
6k closing
6k annual property taxes
$250/month insurance
7% repairs (again, collective worst case)
8% vacancy (very far above average)
7% CapEx
10% property management
$5656/month expenses
Income:
$500/month/room (still below market value)
$8000/month Income
Cashflow: $1831/month, or $228/unit.
When given a chance to meet average rents, but keeping the high vacancy, CapEx and repairs, the cashflow goes up to well over $2k/month.