Want to visit Australia in the month of Feb'18 with my wife.
As per the various web sites South Australia / Tasmania is the place to visit during the month.
Kindly suggest the best places to visit and the best budget places to stay.
Would Hiring a self drive car be a better option than travelling through trains etc while on the trip as better time management & saving on costs?
I would be travelling from India

Arvind

What do you want to see? South Australia is very hot during that time . You would not be able to travel by train in Tasmania

I am looking forward to visit Melbourne

Melbourne is in Victoria.

Start here: Australia.com

Get a good, scaled, paper map of Australia.

Google maps will give distances & an estimate of driving times.

Use booking.com to see what accommodation is available, where and at what price. There is a map on each listing, so you can proximity to transport etc.

Flying is th most cost & time efficient transport for long distances between major points.

Donstic carriers: Qantas, Virgin ( full service)
Jetstar & Tiger ( budget - watch out for on-costs)

Do have a check on travel checklist, it will ultimately help you.
And for the places, you must visit in Australia, you may consider this link.
https://www.businessinsider.com.au/2...-opera-house-1

There are many beautiful place in South Australia to travel. But it is so costly for visit there. So you must be economical to staying hotels and conveyance. You should stay in average rated hotel and use public vehicles for visit different tourist spots.

Weather in NT pleasant in February - I don't think so. It's the height of summer and the heart of the wet season with heavy rain and temps ranging from 24C to 38C .
I did love going to Kakadu in the the wet because it's so different but the weather is not pleasant.