Usually the residual is not negotiable, other than the fact that the lender publishes different residuals depending on the length of the lease and the number of miles. The purchase price, is, of course negotiable. The Money Factor probably is negotiable too as some lenders allow the dealer to mark up the money factor for extra profit. Perhaps someone here on the site can tell you what the base factor is and whether there are ways to get a better money factor. So, to answer your question, yes, all of those data points matter. They don’t just have a “huge” effect on the payment as you asked they ARE the payment. To better understand leases take a look at the post I wrote in this thread (I think it is post number 24) and you’ll easily understand why this data matters:
