Even though I am not a junior in high school I can relate to your sentance: I would do anything to own a Boxster.. I do not own a company and I am not rich, but I managed through hard work to get my Boxster. Although I do not recommend a -97 like most here, I do recommend a Porsche 914. I started with a -73 bug, a -74 914, a -70 914, a 73 914 then I ended up with my -02 Boxster S..
A Porsche 914 IS the old Boxster. Same layout just smaller and much much more simple. Again not a hassle free car by any means, but you will learn how to fix your own car and there are tons of good forums out there to gain the knowledge. Either you stopped reading here or if you are interested, try to find a pre 75 914 and enjoy that during high school. Its not modern but it still corners the same or better than the Boxster AND its still a Porsche..
Here is my 914, (before and after picture) and as you can see I spent a lot of time (not money) to modify if. Boxster calipers, 911 suspension, 911/Boxster wheels.. It is a really fun car and it can be had for more than half of what your -97 will cost you.
I know everyone may not agree with me, but it taught me how to appreciate cars in a whole new way..
Link 1 to 914 Material
Link 2 to 914 Material