Mark
The prime rule in investing is to get as close as you can to the CBD.
This does not mean East Melbourne, or inner Sydney, Perth etc
What it means is:
If you can arrange finance to, say, $250,000 then get as close 'in' as your money will buy.
If that means Hoppers Crossing, then think a little laterally and draw a radius around Melbourne where your market is.
You may find that eg Caroline Springs is a better bet, or Bayswater, or Coburg. West Heidelberg, if you've got the vision!
In other words, use tools like
www.realestate.com.au and search the for sale and for lease listings to give you an idea of rental returns.
Hoppers Crossing has many good points, but my suggestion would be to buy in the older area closer to the freeway, rather than in the newer subdivisions.
Remember, your tenant may be saving for their own home, and would appreciate only having to have one car. They can walk to the shops, schools, doctor etc from the older, eastern part of HX, plus there's room for improvement and thus potential for capital growth above the median for the area.
Lastly, Mark, if your interest is in HX, then go with your instinct, spend a bit of time driving the streets, loiter in the shopping centres and observe the locals and their spending habits. Who will be your tenant is more important than you may realise!
Good luck!
Kristine