a 30 year loan with cba owner occupied, interest + principal...

a 30 year loan with cba owner occupied, interest + principal repayments would be $2486 a month on 300k borrwed

if you rented it out at 400 a week you have quite a short fall + add on the lost interest of 7k for the 100k deposit you put in

for the rent to cover the repayments, you could only borrow about 200k

http://www.commbank.com.au/personal/tools-calculators/default.aspx

bad idea as an investment imo