Hey there,
to e39m5: I know that you said you can afford it, but take the time and do the math and research for what is reasonably expectable (can't always plan for the unexpected) and see if you can feasibly support such a car based on the "best case scenario"
Before I purchased my own car, I researched what a good interest rate was for the time to include economic/political (etc.) circumstances happening in the contemporary situation, determined various amounts of money I was willing to put down, and determined what kind of monthlies you can expect based on several variables. Let's just say that right now at this exact moment, you may not get the best interest rate because of economic circumstances, and take into account that the interest rate you'll get now will lock you in for 36 months, 50 months, or however many months you end up taking out a loan for. Also realize that most institutions are highly hesitant to create a line of credit for a car more than 8-10 years old (or whatever your exact vehicle age is for the NSX) and this in itself could end up in disapproval or even more elevated interest rates. Shop around for a fair one, and try to do so without hurting your credit.
Coming from an Operations Research background, and being very good at calculating things using spreadsheets, etc. I programmed my very own spreadsheet(s) to accurately calculate monthly payments and other things like that (won't factor in other fees which you do not know the exact monetary value of to include registration, paperwork, etc.).If you want the monthly payment estimator spreadsheet just send me a PM. I will gladly email you the simplest easiest version to use to you. Not that these resources aren't available to you online, but you can save various versions of the spreadsheet to refer to in the future, so this makes it convenient.
Also, shop around for insurance while you don't own the NSX. Look at the VIN#(s) of vehicles currently for sale close to the condition you are shooting for (year, mileage, etc.) and see what kinds of rates you can get. Might as well find the best rate for the coverage provided (granted you should be getting full coverage anyway) while you're at it.
Look at how much you'll be planning to pay for in terms of parking fees (if applicable) because I know certain colleges make you pay for a space per semester, etc. and look into any other sort of expenses related to the monthly upkeep of the car.
Calculate how all these items in the best case will affect your "Net income". Realize that this requires you to know what your Gross Income is along with other expenses you can expect to be paying while in college, so go research tuition (if applicable because I know your parents might be paying for you as is the case with many college students) otherwise you'll be paying for your own student loan, and research any other expenses you might expect to have, so calculate the worst case scenario for that as well. When you find out how much elbow room you have in terms of disposable income, then determine if the choice to own an NSX is right to make right now. Personally, this took me a couple months of research to do on my very spare amounts of free time, job and school, so you should know that this is a very involved process. Sometimes in a month, you might end up having an expense, let's say buying books (which can easily reach $800 in august), that makes it very difficult to make ends meet for just that month. This can make you delinquent on a car payment, and cause you to default in the long run = repo, hurt credit score, etc.)
Please by all means do your research, and see if your current job can foreseeably support your for 5 years, or be easily replaced by other jobs which you can take in lieu of school later on down the line because taking out a line of credit is a HUGE commitment. PLease please please do your research before diving in. It is an involved process, but if you are committed enough to your actual dream and long term benefit, it shouldn't be difficult to do. I basically spent my free time from my job and school doing this and it paid of in the end for me (at least after my very own cost benefit analysis) however, I feel stable enough with how much funds I have in "emergency" (more than $35K which could actually pay off my car if i really wanted to right now) and monthly disposable income to take on such a risk, and it is a risk, trust us all on this one.
Please do your very own personal research and let us know what you find. This is probably where you'll have the most progress (as opposed to spending time here in the forums), but by all means come back here if you need help with the details of the research as well
good luck with this adventure, and happy holidays!
-Dan
feel free to PM me if you still need some personal help, I'm willing to help if you're willing to take in all of our advice.