It sounds like you are playing with the numbers to convince yourself you can afford it. No reason to do a cap reduction on a lease, if you are hell bent on putting extra money down do multiple Security Deposites - that will lower your payment and you get it back at the end.
Are you sure you only need 10,000? You originLy said 12. Before I started leasing I had no idea what my yearly milage was and I wrongly estimated 10,000 and am paying for it at the end of the lease.
2011 E93 M3 Jet Black/Fox Red/Carbon Fiber/DCT/Premium/Tech/Premium Sound/USB/Sat
2008 E92 Jet Black/Saddle/Dark Burll/6MT/CA/NAV/Sport/Sat/USB (RIP)