I visited Big Huey's Diner, across the road from the South Melbourne Market, in South Melbourne.
This place is amazing with an awesome atmosphere, where you can see Iain Hewitson (chef with his own TV shows) cooking your dinner and later watch the television in the bar with Iain himself.
The restaurant is extremely affordable and the food was simply amazing. The restaurant is very family friendly and the staff were great with dealing with kids.
To prove how cheap the food is, a kid's meal is $8.00 where the kids receive a meal of their choice and an ice cream with some delicious flavours. A main meal - a burger and chips - is around $15.00, which is a great price for the amount of food you receive!