HTC 5G Hub is $480 ($504 off) if you pay for it over a 24 or 36 months with a mobile broadband plan. Mobile broadband plans start at $15 per month with 5gb but suspect that you would burn through that in a few minutes with the 5g hub!
So the hub is $20 per month over 24 months or $13.33 per month over 36 months (plus factor in the cost of the mobile broadband plan which starts at $15 per month).
So the minimum would be $35 per month over 24 months or $28.33 per month over 36 months.
Might be a decent internet replacement if you can't get NBN.
Hey OP, might be worth mentioning ‘Telstra’ in the title/description.