@ritay You've done the figures yourself, looks like any of the EV options are going to cost you more - drive the Fiesta into the ground and upgrade into something bigger for the family in 4-5 years time like you suggested.
@mikeah777
https://www.abs.gov.au/media-centre/media-releases/retail-turnover-boosted-sales-events
Sounds like consumers took advantage of some particularly good sales over the time period.