First, you didn't account for the indirect costs of a lease:
- You're either paying for mileage you didn't accrue, paying disproportionately for overages, or - like most people - you are imposing upon your spouse/kids/bicycle/etc. to stay under the limit.
- You're losing all possible resale value benefits that might come from good care or upgrades.
- You're paying for stuff you don't need like premature tire replacements or whatever else they want to ding you for upon return. Most dealers will only back down from these fees if you agree to pay full price for the next lease.
- You're paying fines on any non-OEM maintenance or repairs, such as different tires or aftermarket glass.
- You're risking financial loss if your life situation changes in any way, even just a simple change in your commute will have financial repercussions amplified by a lease, but if your life changes in a more serious way a lease can complicate it significantly.
- Last but not least, a lease is the most permanent commitment you can possibly make to a car. That in itself is a huge cost because it amplifies all of the above points and controls every aspect of your life, right down to the fact that you have to plan vacations around your lease end date. How sick is that?
If I sell the car for $30,000 (60% of MSRP)...
That's obviously the only number that matters in your calculation. All that other stuff about taxes and interest rates makes no difference when you can just pull a resale value out of thin air and sway the equation any which way.
And that's really what a lease is - it's the manufacturer's prediction of - and attempt to influence - the resale value. Kelley Blue Book and others use the lease residual value as one of the dominant metrics in determining the private resale value.
With billions of dollars at stake, you can bet that one of the most critical things to every automaker's profitability is to have a huge team of the world's most brilliant financial analysts working year-round to determine the perfect lease pricing. You can't compete with that - all you can do is guess "60%". And you know what? The house always wins. The odds are stacked against you and that too is part of the lease profit strategy - they know you're drawn to the lower monthly payment and reduced sales tax so they use that advantage to get a little more profit from each lease than they would from a similar sale. Think about it - why wouldn't they? A lease is a hardship on them - they want cash, in full, today - especially growing companies like Tesla. Of course they're going to price their leases at a higher profit point than their sales. Come on.
So unless they screw up, you will always pay more for a lease than a purchase. Sure, it's possible that Tesla could screw up - they're very arrogant, most EV's depreciate faster than average, and other rapidly evolving consumer technologies like phones, computers, and TVs lose value incredibly fast. But don't bet on it. They know what they're doing and the market isn't going to be flooded with EV competition in 3 years. All these new EV's that just barely exist today (Mustang, Polestar, Bolt, etc.) will still barely exist in 2025. Their planned production numbers are tiny, just a few hundred thousand per year. Even Tesla isn't going to flood the market anytime soon - they're going wide, not deep. They have an entire world to supply before they can get around to overproducing here in the US.