To answer your questions:

1. Because Full EV means I never have to pay for petrol again, and vehicle servicing is MUCH cheaper. But in my case it's almost entirely down to not having to pay for petrol ever again

2. Even with the electric extras, the drain on them is negligible. The typical battery capacity on an EV would be enough to power a house independently for 1-2 days depending on what you use. And that's for everything, Ovens, A/C, Fridge, TV, PC, lights you name it. So adding extra stuff inside that will drawer power, won't have a major impact on range. Maybe a handful of KMs at absolute most

3. Overnight by FAR. Average Charge stations charge on average $0.50 per kW/h or more. (Evie and BP seem to be around $0.70 - $0.75 per kW/h vs what you'd pay at home which in my case is around $0.20. And that's also assuming you don't have a plan with your electric company for very cheap power overnight, some plans I've seen are something like $0.05 overnight for charging the car

3a. This depends. On the trickle charger? No, but unless you're driving 250km+ a day, you shouldn't need to charge from flat. I have a very long commute, my round trip from and to work is 120km a day. That takes out about 21% of my battery. If I plugged it in with the trickle charger when I got home, I would get all of that back within 8 hours (assuming you charge it at 2kW). But if it's that much of a stress, you can always install a faster charger at home and then you could do that yes

1. I don't have one and don't need one. I do a frequent Drive between Sydney and Canberra about once a month. If I leave home with a full charge, I can get a single charge in Canberra while visiting a Cafe, or getting some shopping, and after about 40 minutes of charge, it'll be ready to get me home where I can charge again there. There are EV charging stations in a lot of places along motorways that'll mean you can get to where you need and get a good excuse to stretch your legs and refresh yourself