The answer is you're probably going to pay more..
I am a lease hacker, and currently pay about $5000 every 2 years for a loaner Mercedes C class myself, 12k/year. I don't have to buy tires and do one maintenance during that period that costs $400. So, total cost of ownership (including all fees and taxes is $5700 (another year registration). Keep in mind I also got 25k UAL miles thrown my way. If I extrapolate that, over a 6 year period, It costs me $17,100 to lease the Mercedes all in. I'd like to see anyone get close to that on any Tesla.
In the end, you have to do it because you prefer the car and are willing to pay a premium for it, rather than as a money saver. Mercedes also gives me loaners for service, does not nickel and dime on lease returns, etc.