What are you thinking the monthy costs will be?
Last October a friend got a '08 DCT M3 for about $1050 a month for 3yrs/15k miles with the standard $2500 down (plus fees, etc...). Also this was during the 1% program.

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'98 Type R drag car ~1400hp
'01 X5 3.0 silver (sold)
'02 X5 4.6is silver (sold)
'04 X5 4.8is black (sold)
'10 X5 ///M Alpine White