Are you receiving US dollars for your sale. Casa Puente say the US dollars need to be converted from MEB to Cable before they can be transferred internationally from Argentina. The conversion costs c.3%. I never knew there were different types of US dollars.If there is an inmobiliaria involved, ask them for suggestions.
I am going thru a similar transaction...selling a house and transferring to USA...about 1/3 of the total you mention...in PBA about 300km from Capital.
My inmboliaria suggested local place, similar to Casa Puente mentioned above, that would do the transfer...2-2.5% comission
I am sure in Capital I could get lower comission...just that driving with all that cash is not really appealing