Thanks CRJ sorry but Im a newbie here so will try and give as much info as –

Ok I recall we now approx owe $198,000 outstanding on the house
We jointly earn $170,000 per annum – we are in great jobs
We rent a property we now live in at $450 per week
Mortgage is $1,200 pm fixed for next 3 years
expected rent is $990pcm
NO other outgloing apart from $200 pm car loan, no credit cards No kids

Looking wanting to borrow up to $300k for another  IP

Next year we would like to buy a property for us to live in and not rent anymore at approx $600,000.

Hope that helps