If I were building an EV for 50-100 km range in the next few years, I'd personally be thinking about
Firefly batteries over lithium.
Also, this just came up in another thread, but you folks in Australia have access to a style of vehicle that's nicely suited to lead-acid conversions: the UTE. North America gave up on this style of cars 20-30 years ago, but they really would be good for carrying lead, and for aeromodding.
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Confirmed my thought that going further between charges makes for higher overall efficiency: 15.8 km in the last 2 days on 3.5 kWh = 94 eMPG (US).