Selling the lease is no impact on credit score.
But what is the basis of those promises? With a rough math they have to pay more than $57-58k to have you at positive.
If you look at the used 22MYs, I highly doubt they would want to give that much for this car. They may say they are giving but probably they will take away your discount from the new one you are leasing. You just signing up yourself to buy a second car from them which wipes out all your negotiation power next year,