Why don't you flick one of us an email with your details and we can run your numbers through some calculators?
At least then you'll know what to aim for with either savings or the IP's return (or both!)
It's hard to hit a target when you're not sure what it is.
Don't forget that if you're buying an IP that you can also use rental income in your servicing. Often with first IP's the deposit is more of a problem than serviceability, especially if your other costs and debts are low.
