Is this "responsible for" amount 50% of the mortgage principal or should I put all 100%? 

No, by amortization I mean amount of principal paid down every month reducing the mortgage balances.2.

The principal works until it doesn't work.

After looking at the difference, it would be over 400-$500 additional in principal and interest a month.

We are hoping that rates come down enough that after we refinance we will be able to move out of the property and hopefully have rents cover PITI payments.I realize that until we refinance, we wont be gaining any equity in the form of principal reduction, but we are okay with that for a couple years because we would still be gaining some equity in the form of appreciation and renovations.Does anyone have any comments or feedback about this strategy?

Let principal paydown and appreciation create wealth, forget $200 per month or whatever.it's what the hedge funds do too.

Smith, RA - Principal Architect at Architect Owl PLLC (Licensed in NY & CT)

They will continue to pay me principal and interest for the next 50 months and then pay the remaining principal off at that time. 

In essence, the DSCR measures the property's cash flow available to cover debt obligations, including the loan's principal and interest payments.How Do DSCR Loans Work?

Or can I not represent myself and act only as the principal, while disclosing somewhere in the contract that I am licensed?