A friend of mine is asking me the following:

"right now, my 2004 bmw 525i is worth 15,000.
5 years from now, according to kbb, it will be worth about 5,000 => loss of 10k
add 5 years of gas @ $4/gallon, that's $10k of gasoline = cost of keeping this car is 20k
add a minimum of $5k repairs = that's 25k cost of owning this car.

if i buy a nissan leaf now, out the door and of pocket $40,000.
sell the bmw at $15k = my cost will be $25k.
government tax savings and rebate 7500+2500=10K , => so getting this car cost me $15k.
value of car in 5 years (50%) = 20k. ==>that puts me in $5000 positive category!
so i make money out of thin air.

plus, no more smog check, inhaling gas fumes, and oil changes.

am i missing something?"

Any advice is appreciated.
Thanks