FINANCE

Speak to a broker or your bank early in the process.
Preserve capital by using bank guarantees for 10% deposit.
Discourage cross-collateralisation or cross-securitisation. Try to secure one loan with one property - (not always possible especially if you are buying your first investment property).The banks will try and take everything you have to secure their interest.
Consider interest only loans again to preserve cashflow.

Many investors refinance their family home to release equity when purchasing investment property. This process does not have to be completed before purchasing, but it is prudent to have a clear indication it is possible.