4 or so years ago when I was setting up an internet connection at my old place it worked out cheaper to have land-line with Telstra plus adsl connection, than it was to have naked broadband.
What's the go these days? Is this still the case? I use less than 5Gb of data per month…
You could probably go with a mobile data option with either a GSM/LTE router for Wi-Fi sharing the internet access or tethering from your smart phone hot spot.