I know what you mean. But where else are you gonna be living in the long-term? Plus, you can buy a place, save on not having to pay rent and if you want to move somewhere else in 2 years time, just rent it out and have somebody pay your mortgage.
Why 50%? Calculate the service cost on a mortgage based on 25% and do the same for 50%. Write down the difference. Then calculate how long it'll take you to save up that extra 25% (to go from 25 down to 50 down). In that time period calculate how much rent you'd have to pay and how much you lose on appreciation. Compare it to the number you wrote down previously. It might be smarter to buy on 20-25%. You might also wanna take advantage of the low interest rates. The feds might increase the rates. American GDP will grow by more than 3% this year and an interest rate increase might be in the books.
That remains to be seen. Technically, cars today are light years ahead of what was being produced in the 90's and 2000's and Dena is still 90's tech. 15K is Iran's price. If they wanna export it, they have to add another 5K on top, minimum (creating points of sale in foreign countries, advertising costs, foreign exchange costs, transportation and other misc. costs). At 20-25K, Dena isn't competitive.
Some examples of the competition, all of which are better (MSRP means manufacturers suggested price and you can often negotiate it down and get it for less):
Nissan Versa: 11,600 MSRP
Ford Fiesta: 13,200 MSRP
Kia Rio: 13,600 MSRP
Suzuki SX4: 14000 MSRP
Chevrolet Sonic, Hyundai Accent etc... all under 15K
A Volks Wagon Golf starts at 20,000 dollars!! VW Golf is light years ahead of Dena in every department, even the exterior paint is miles better.
It's a great looking car, but it won't be a hit in foreign markets like you think. Iraq will import some probably and some more will go to the usual markets. But nothing crazy. Price is too high, quality is too low.