Slightly incorrect; If you know you will travel 300+ miles on 2 CONSECUTIVE DAYS, and don't have a 7kW charger, and won't have ANY other method of charging over those 2 days. Then an Ev probably isn't the best choice for you.if you know you will travel 300+ miles a day and dont have a 7kW charger at home an EV probably isn't best choice at the moment.
I don't think there is a massive price difference between a 7kW(closer to 8kW usually if you get your full 240v or higher) charger and a 3.5kW charger.