My monthly HH income is 16k USD after tax.After looking at multiple properties and calculating the overall net income it is quite difficult to come to a net positive cashflow (taking into account Mortgage payment, HOA, property taxes, insurance, rental taxes). 

Payment for winning bid would be collected at "Clayton County Administration Annex" 121 S.

With the standard disclaimers about tax advice and how everything depends on your goals: If you have a high income, when you cashout refi you may also able to take the interest payments as a write off, which may make your effective interest rate lower than it would seem. 

This is scary to me: Two deals, no money, How does he plan on making the mortgage payments?

They can hook you up with these contacts, making your real estate journey smoother.Since you're looking to cash flow, I'd suggest you take a closer look at Cleveland's Section 8 market, its known for reliable government-backed payments and high tenant demand.

They want a big down payment as well, basically enough to alleviate a financial issue, and enough for a downpayment on the next purchase.

Who is entering the payments on the tenant's ledger?

However, I'm facing a shortfall: I need an additional $300,000 for the down payment due to a delay in cash-out refinancing on three of my properties.

We're considering a 30% down payment for DSCR mortgage.Do you think this is a good deal?

I have the lease and can make a spreadsheet for payment stuff.