Hi Mickey34,
Well, sadly the Mercedes is definitely a no. It is as you've discovered impossible to import anything but classic cars into Brazil and even then an excercise fraught with difficulty and staggering costs.
Your computers however are a different story. You're coming in on a student visa and you should be able to import them "temporarily" without paying any duty. Since you'll be staying here long-term they should be considered tools necessary to your studies. If you bring them with you on your flight it's quite likely they're not going to be subjected to any kind of duty.
Have you considered rather than just giving up everything that you own, putting them into storage for a year and see what the future holds for you in Brazil? For example if you obtain permanency (perhaps as an investor) it's going to be less likely that you're going to be charged duties on many of your personal possessions when you do eventually bring them into the country, and perhaps it would be a bit more worthwhile to take on the burden of shipping costs at that time.
Have you also thought of the other side of the coin? What if you find that Brazil is not a good fit for you, or you're not a good fit for Brazil??? Don't you think that if you feel like you're "shedding" your entire existence now in coming to Brazil, that you're going to be more than just a bit PO'd if you find you're not happy here and decide to go back home? Just think how it's going to gall you if on top of the feeling that you haven't been able to make a go of things here you find you've then got to shell out your hard earned cash to replace everything you already had before you came here. Won't you kind of feel like you burned your bridges before coming here, and had done so all to no avail?
Long-term storage for a year shouldn't be too expensive and may prove to be a worthwhile expense. If you don't want to pay for a storage unit, perhaps there's someone in your family or circle of friends who could be of help there and "adopt" your belongings temporarily. While none of us starts out on any kind of venture planning to fail, making a permanent move to Brazil (or any other country) doesn't come with any guarantees. Don't you think it prudent to kind of hedge your bet by at least giving yourself a year (or more) of a safety cushion by storing your belongings before having to make any kind of permanent disposition of them? I think that having a "Plan B" is always a wise move! If you are eventually going to get rid of everything anyway, what would be the difference between doing it now or later, other than the cost of storage (if necessary)?
On the other side of the coin, the knowledge that your stuff is all still waiting for you back home, would be a bit comforting in that you wouldn't feel trapped into sticking to your decision of staying in Brazil should you find you're really not happy here. Just saying...
Cheers,
James Expat-blog Experts Team