I'm looking for an ISP that would provide the cheapest ADSL plan per month (including the phone line) in Wellingotn region with at least 3GB of data for my dad who needs only occasional internet access, such as checking emails and news every couple of days.

The cheapest plans seem to all start with something like $72/20GB with Slingshot, which I am on. Is there anything cheaper?

I also looked at the best rates for mobile broadband in a USB stick. 2 degrees offest 12 GB for $99 for 6 months and a device would cost $50. Is there anything better in that space? It's a pitty most data plans have it expiring in a month (with the exception of the above). Ideally he would get prepaid data so he buys only as much as he uses regardless of time.

Any suggestions appreciated!