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system
leasing a car i intend to buy
user
what does not seem reasonable about your plan is the payment and buyout.  while $200/month payments are possible (but hard to find), buyouts are more typically in the five figure range. given that your savings and desired payment for a car is low (the average car payment today is about 450/month), can you really afford the massive depreciation of a late model vehicle? why not purchase a 2000 car now, and save the 200-300 per month?  in about a year you could move up to a ~5000 car.  you can buy a pretty nice car for 5k.   myself, i am on my third year of driving a 4000 car.
assistant