Most of the BMW and MB deals are 36m and any lease can be structured as 10k, 12k or 15k per year. Each increase of mileage from 7,500 to 10k to 12k is only a deduction of 1% of MSRP from the RV.
Something like an BMW EV loaner is probably not going to be far above a Model Y after including all taxes and such on the Tesla.
For example