You may want to take out negative temporary to correctly evaluate pure Q3 deal first. Then tackle it back on if you must. +1 for incentives question: on east coast, there is $1750 in lease cash and Audi something something. Have you confirmed what incentives are in your region that you eligible for?
In OP you said 600 a month with 5000 DAS. Where did 3500 down come from?
Anyway this is your calculator with proper RV, MF and incentives, including ~5K of negative equity from trade tackled on dealer fees. Assuming they are giving you buy rate, 10% before incentives is not bad at all.
Try pushing for 11%. I’d suggest doing MSDs as well instead of large DAS. Will lower your rent charge significantly and you’ll get that money back at the end. It’s that negative that makes this deal look atrocious on a surface. Have you tried getting offers from Carvana, Vroom etc to see if you could get better price for your trade?