Interest rate
Its leaving yourself open for possible issues. Are you 100% certain that the IP is not cross secured against your home? we find a lot of banks do this without even telling their clients that they have done this and when they go to sell it or draw equity the increase in one...
Keep Loan 4!
First question:- are all of your loans with the same lender????
From a risk perspective keeping your PPR and your IP's with separate lenders protects you.
E.G - For some reason you have something happen where you can't pay your PPR loan and get behind on repayments - because...
CBA can do Unit trust structures - I have done something similar in the past with Super funds with people who don't have enough to do SMSF on their own so they get together with a few friends and their Superfund makes a one off investment into a unit trust. The Trust buys the property and then...