Short answer
Model the deposit, loan amount, interest rate, fees and refinance timing as a finance stack. The key question is not just how much debt is available, but whether the deal survives the cost and stress of that debt.
How it works in Koreograph
The finance controls let you split purchase funding between cash and loan, model refurb funding, add refinance periods and see the effect on cashflow, DSCR, equity, IRR and total wealth.
Developer view
Higher leverage can improve cash-on-cash returns but reduce resilience. Check whether refinance assumptions depend on an ambitious valuation, optimistic rent or low interest rate.