Hi Reno,
I live out this way and often pass through these towns. People can and do travel to Traralgon, Warragul, Drouin, even Pakenham for work. Has good rail and highway links.
These areas are fairly low entry-price areas. If you do buy, perhaps look long and hard for something that has a unique aspect - park views, golf-course location etc.
Moe...agree with Duncan. Commish housing, low rents, poor mean incomes. If I were going to invest there, I'd look for units very, very close to the cbd / town centre, perhaps looking for elderly tenants.
Morwell has changed quite a bit. You'll probably want to look north of the railway track at the main shopping strip which now houses new local council offices, law courts, strip shopping. Looks very snazzy for Morwell. From memory, there was quite a bit of retirement activity in this area - small 2 br units / townhouses etc.
For a house rather than a unit, I'd look further East of the Morwell CBD, just out of town towards the Midvalley shopping centre. The area is far nicer and is closer to the bulk of the area's work-force ( I'm guessing ). Houses and streets also look very suburbanish.
Traralgon...was a great buy before the boom. I'm guessing it's a fair bit dearer now. It's an attractive town in my mind and houses ASIC and council offices from memory. Also closer to large town like Sale.
Sale has the air-force as a primary employer, and is quite a nice and large town. May be worth checking to see what other industries they have...and how long the air-force lease runs for.
Hope this helps.
Cheers
Fish.