hahahah
it very much depends on the area, you cant just blatently take the first three numbers, it depends on what the market averages are and what the market is prepared to pay...
and back to ur original question $350,000 with a $285 per week, no probably not a good choice if you were lookin at rental incomes, i can think of a few places at the moment where you can spend $230,000 and get at least $270 p/w back. also depends if you are prepared to buy out of the state, which is what we're doing at the moment, due to a few reasons.
Very much pull up some realestate sites,
www.realestate.com.au www.domain.com.au and check out rental prices for the same br, bath etc locations then compare.
Murf