That's 4x what I pay insuring a 15 year old Accord. I pay $1 daily for full coverage with high liability. As a lawyer I carry huge liability, I think it's $500k or something like that.
Over 10 years, you'll pay $12,000 more in insurance. Plus your $65-70,000 vehicle (I'm factoring the likely taxes and other expensive purchase hits), will depreciate at least around 1/2 (to be generous, probably more), so let's call that a $35,000 cost. Fuel and maintenance costs are wildly debateable.
But in 10 years, the most my 15 year old Honda does is become 25 years old and depreciates about $10k. A $70k EV costs $12k more (your numbers) to insure in that period, while also losing $35k in value. Total "cost" difference without looking at fuel or maintenance, is $37k more for the EV in 10 years versus a sensible vehicle.
And PS I do not believe ANY of the marketing hype on recharging costs, convenience, battery life, etc. What we do know is that battery tech is always dishonest in marketing and I've never had any battery perform as advertised. They all die prematurely, especially when exposed to the climate like cars are. The "best case" is the grid is up and working, rates remain low, and you're in a convenient safe place to charge it for hours (overnight usually). We know the world rarely is "best case." For instance as I type this 1 million Texans don't have power. Kinda stinks if you have a EV on empty there. Need to find a portable gas genny I suppose to bring it to your house and charge your car for hours.
Now, perhaps you must driving something like this to impress clients, and it might ultimately pay for itself. That $40k might be viewed as an "investment," of sorts to solicit client trust (I've never understood this but it's a fact of life). I have long ago stopped working myself to death to impress others. I just don't care what others' think. I would simply do something different with that $50k over a decade than a liability/depreciating asset.
Well, I've been driving an EV for the last 4 months. I've not had any of the issues you allude to. I have lived in the same place for 6 years, now, and have not had any loss of power for more than 48 hours (one occasion), or rate increases.
I'd say you numbers for price/cost/valuation are about spot on, at least as best I can calculate. The thing you left out if maintenance cost, which for an EV are less. My CX5 was by far the cheapest vehicle I've owned to PM. It was just oil changes and tire rotations every 5k miles. That cost me $80. Over 150k miles, that is $2400 in PM. From what I'm reading, the EV6 is going to cost me about the same for routing PM, over 150k miles.
Recharging costs have been spot-on what I was told they would be. It really is as simple as kwh used x kwh cost = charging cost.
I do not care what my customers think of me, nor do they even know what I drive. I buy a vehicle solely for myself. The EV6 is one of the safest cars on the road (important when you drive 25-30k miles a year), and I enjoy fast cars that perform. I buy a vehicle for MY mental health. Noone else's. When I go get in the car after a bad day at work, I want to at least have something to smile about. Not be walking out to this 20 year old gutless POS and shake my head and think "really? For WHAT!?" and angrily drive away wishing I had something to smile about. Dollars in a bank account do not generate smiles for me. They're abstract fiat currency to me and mean nothing.
Now batteries...when we look at Kia's SK batteries and their depreciation of charge, etc. we have a pretty good view, going back to 2016 or so in their Ioniq 28. There is a YouTuber, Bjorn, who does very good battery degradation tests, etc. He took an Ioniq 28, and tested it. The car had 92K Kilometers on it. The thing about the Ioniq 28, is that the pack is air-cooled, and obviously has a lot less engineering behind it than the EV6 GT's pack, which is liquid cooled. The car showed to have 8% degradation. He also tested another Ioniq 28 with about 50K km on it, which had 5% degradation, which tracks very well with his prior test above. This gives me confidence not only in EV batteries of the pouch variety, but also Kia's implementation of them. Multiple users on the EV6 form have 20-50K miles on theirs, with zero apparent degradation, although their tests are not as impressive as Bjorn's for validity, it DOES provide "real world" experience/evidence.
I myself did a long range battery viability test spanning from 2006 to present using 18650 cells. I abused them in the worst ways possible (I ran them so hot on a daily basis for years that they melted the battery pack housing, and I also fully discharged them and let them set for years that way.) There is a LOT of abuse you can heap onto a cell in nearly 2 decades. Every one of those 8 cells will take and hold a charge just as well as a new Molicel P28a right now, and they are currently hanging out after being left fully charged for about 3 years, now, with the last known voltage check about 1/2 year ago, being 4.13v (for reference, this is close to 95% charge retention).
Battery viability was a huge thing for me, and I wanted to look into, and have obviously always considered, it to be "a thing".
All this to say that I have seen documented, as well as personally documented, that rechargeable batteries in pouch and cylindrical form are a very viable long-term product. That is also to say, I'm buying a 150k mile warranty which will cover the battery 100%, in the event that it were to not hold at least 70% capacity by then, because hey, sometimes flaws and faults happen.
https://www.geotab.com/fleet-management-solutions/ev-battery-degradation-tool/