(His profit is in the entry fee) He owes 3 months missed payments and I offered to catch up the arrears, bring the loan current, and take ownership.I myself own and operate 13 units since 2017, and I’d say I’m a good operator.Anyways, the issue is that now the bank/owner has been notified of non payment, and while the seller is telling me everything’s fine between him and the person on the note and all, I know that the bank has eyes on this account now. 

To me, if you aren't at least maintaining 0 cash flow, you're betting too much on appreciation to the investment work. 

Sounds like their combined income likely beats your other tenants.Your gut is probably your best bet and you need to go with it. 

@Toby Khan I’m not positive honestly, best bet would be to reach out to them.

Evaluate forming an LLC to protect both parties and outline everything in an operating agreement.

100% agree either make it operable or get a fridge with no dispenser. 

If one or more units are vacant, the remaining units often don’t provide enough cash flow to cover expenses, making it harder to meet operating costs.Maintenance costs: A fourplex comes with four times the appliances, plumbing, HVAC systems, and other components to maintain, leading to significantly higher repair and maintenance expenses than single-family homes.If you want to see the detailed calculation, read this BP blog - More Units Doesn’t Mean More Money—Why a Single-Family Home Can Beat a Fourplex.Resale value: Multi-family properties have a limited buyer pool—mainly investors—who base their offers on CAP rates.

Rough calculations on what I need to be looking for:90k deal (purchase and renovations to get max rent)20% down = 18k from me80% bank loan at 8%, 20 yr amortization = 72k-------------------------------------------------- Here's my DSCR calculation:Calculate Net Operating Income (NOI):Monthly rent: $125040% expense ratio (taxes, insurance, repairs, vacancy) = $480NOI: $1250 - $500 = $750Calculate Monthly Mortgage Payment:Loan Amount: $75,000Interest Rate: 8% per year (0.08/12 = 0.006667 monthly)Loan Term: 20 years (20 * 12 = 240 months)Monthly Payment ≈ $627.83Calculate DSCR:DSCR = NOI / Monthly Mortgage PaymentDSCR = $750 / $627.83DSCR ≈ 1.20Therefore, with a $75,000 mortgage at 8% interest over 20 years, the DSCR is approximately 1.20

Build a local team for cleaning and repairs to streamline operations.

I would do what you are doing here on a bigger scale - social media, local markets she operates in Facebook groups, etc.