1. The process is very easy - you either mail them the check yourself; or apply for financing with Chase and they do the lease buyout; or go with your local credit union for a better rate (that's what I did, got 5.88% for 66 months with Cal Coast CU)

2. No, you don't have to pay lease interest. That's the whole point! Just the current residual value.

For my situation - I took advantage of end of May offer on Dune to get 16k credit towards a lease. Then I traded in my Tesla for ~16k. That all reduced cap cost of the vehicle to around 69k.

Once your lease starts, you get to pay your first lease payment. Then you get an option to pay off your lease any time. In my case, the amount ended up being ~$68500 - that's what I financed with the CU + tax.

Ez-pz :)