Organise a new loan split on the PPOR for 20%+ purchase costs, then borrow the residual 80% against the new purchase.
Or if you have the equity and plan to make multiple purchases, borrow out via a separate split as much as you can up to 80% LVR on the PPOR, then you can draw from this via this as needed for the purchases. Ideally use a lender which will allow you to split the loan account without application for the best use.
