Anybody can rent or buy a 12 passenger van in Argentina and get insurance for it, Renting (there are many van rental agencies) is very expensive so sometimes it can be a better deal to buy it and sell it when you are done with it even if you only need it for a month or two. You can buy a used 12 passenger van like a Mercedes Benz Sprinter 300 series on www.mercadolibre.com.ar
starting at around USD $10k. Below I'm copying how to buy a car or van from another thread.
Updated info 2009 on buying a car in Argentina.
This information is updated 2009, legal, verified, and tried several times by me and different foreigners in 2009, to buy and transfer a car in Argentina. There is many ways to buy and transfer a car in Argentina, there are cheap and easy ways and there are complicated and expensive ways.
I am first going to explain the cheap and easy do it yourself way.
To start all you need is Passport from any country with the normal 90 day tourist stamp you get when you enter Argentina.
Print the 1 page form online here http://www.afip.gob.ar/genericos/for...s/pdf/f663.pdf
and fill it out. This form is changed in 2009 so make sure it says nuevo modelo underneath the F. 663. Now take this form and your Passport and go to any AFIP office, you can ask any Taxi driver where they are located or you can look it up online www.afip.gob.ar/home/
Now you will get your CDI number the same day.
Now you are ready to buy your car, it is as easy as that.
Get on www.mercadolibre.com.ar
or search the local newspapers or go to a new or used car dealer.
The cheapest way will be buying from an individual, so the following is what you need to do if you are buying from a private person.
Find the car, inspect the car carefully and low ball the seller with a low offer, they are all asking to much money for the cars here but will accept substantially less if you treat them with respect.Once you come to an agreement do NOT give the seller any money YET, tell him to come with you or meet you at the nearest Registro National De La Propiedad Del Automotor this is the title transfer office, they are also all over the place just ask a taxi driver or look it up online http://www.dnrpa.gov.ar/
. When you get there have the seller hand over the papers(Titulo, Cedula Verde, Forma 12, ID) to the person behind the counter and tell him you want to transfer this car but first make sure the paperwork is correct and how much money the seller owes in unpaid tickets and taxes on this car, this has to be paid there before you can transfer. When you find out that everything is OK with the paperwork and the amount due in unpaid tickets and taxes (if any) you can give the seller his money and transfer the car right there and then. All the forms you need to transfer will be there like the Forma 08. There are a some forms the seller needs to bring like the, Titulo, Cedula Verde, Forma 12, ID, but you as the buyer only needs to bring the CDI and your Passport. This process is very easy and the people here working at the different government offices are extremely nice and helpful even if you don't speak much castellano, they will guide you and the seller in the right direction and tell you what you need and don't need to transfer you car.
Your second option is to use one of the many highly educated Gestoria del Automotor or Gestor, or an Escribano or Abogado or Doctor or Professor in these subjects, it is unbelievable the highly educated help you can get to transfer a car,(how can you not LOVE Argentina) but also expect to pay in accordance and expect to wait a lot longer.
I know there are many treads on this site saying you need all kinds of documentation like residency, DNI, etc,etc to buy a car when you are a foreigner this is NOT true as of 2009, ALL you need is a PASSPORT of any nationality and a CDI.