Just for comparison, you are pretty far off from what you have in mind and what the market is.
You may want to do a lot more research as to what’s a realistic offer.
Good luck
Edit: my very rough back of napkin calc based on 36/12 comes to about $1800/mth with $6k DAS. That’s IF (a big IF) you even get 9% off and buy rate. That 51% residual is just brutal. This is very much pay-to-play car.
OP’s own residual calc is incorrect ($85k seems arbitrary). Residual is based on MSRP.