Depends on useage pattern. Most people could get by well enough using Public Transport, especially if they combine trips instead of making three or four a day. It'll take longer, generally, than using your car, but you can do 'stuff' while on PT that you can't do in the car (due to the necessity of having to keep your eyes on the road), so it might not be 'lost' time at all.

If I was in the merket for a 'new' car, I'd buy something with a body in good condition, but old enough that you don't have a central computer controlling everything from the ECU to the seat position. If you can find something in good nick pre-unleaded, I'd grab it. Then spend the next year or two converting it in your garage to pure electric. Lead-Acid (not my personal choice) can get you about 40-50km/charge before you start overloading your shock towers/brakes/etc. They'll last a shorter time than newer chemistries like LiFePO4, but they're cheap, and recyclable (and once they're not good enough for vehicular use, you can still use them as battery backup for the house). If you convert a car yourself, I'd probably go for a low-voltage conversion, as it reduces the risk of electric shock while performing any maintainence (risk of electrocution, even in an accident, is close to zero if you design the conversion properly). 72V seems a good compromise between 'workability' and safety.

In the meantime, look for another car in good overall condition, that gets high mileage. Use that as the daily driver until the EV is on the road and the bugs are worked out. If you can find a car that comes in both Diesel and Petrol flavours, that's a good choice (gives you options later on wrt converting to BioDiesel or CNG). If it comes with a LPG tank, use that for now.

The average car in Australia does around 50kms/day. That's achievable on both CNG and Lead-Acid. Yes, there are those who drive two hours to work, but they either have PT as an option for part of the journey, or are in the minority who have no PT access (they'll end up using LPG, BioDiesel, CTL-Diesel, or giving up their cars altogether, imo).

But if you can avoid buying a car at all, do so. You'll save a lot of money by forgoing the 'convienience'.

FWIW, I think the 100km each-way daily commute is dead. It's just a matter of waiting for someone to pronounce it.

(get V6, not the 4 cylinder as converting will reduce x% power)

In a time of scarcity/sky-high prices, 'power' isn't going to be the #1 concern, I don't think. Simple mobility will be.