coheed,
You will not find us discriminate against you, just because you are 17.
I will however, caution you, against getting yourself in a situation were you are car-poor.
As for what your insurance and payments would be, be sure, to also check our experts ( actual salesmen and Dealership finance and insurance managers) in this sub-forum:
zeromain?id=161
240sx will work emissions wise unless you are trying to pass an SR swapped car in a swap senstive emissions station... ( depends on state +location).
Also keep in mind, aftermarket parts are SO MUCH cheaper for 240sx than 350Z.
Unless you have secured a significant amount of income,, besides your college job, I would have to advise against this purchase.
But... if you manage to save up a significant amount, keep in mind Base 03's can now be had ,in 18/19k range for private party sales.
If you can find a way to swing a deal like that, go ahead and enjoy the newer car with fewer troubles ... ( and less class distracting projects/issues).
Otherwise, I would recommend going with a stock 240 (which can still be found reasonable, despite their recent surge in popularity) keeping it more or less stock (no expensive swaps, maybe springs+shocks as mods) and drive it thru college.
Then you will be in a better financial position at the end.
Dont incur additional debt at this stage in your life, were you are likely taking on a lot of college debt and be forced to constantly worry during school, about your car payments and insurance payments.
Fred..