Other considerations
The investment property does not sound like a very good investment, so you should probably sell it and use the net proceeds to pay down your home loan further.
The LTV on your investment property is high at 89%. If prices fall, you could go into negative equity, which would make selling it more complicated. So if you do consider selling it, sell it first before paying down the cash off your home loan. Once it's sold, then you should pay down your home loan.
Brendan