I hope you do go for it!!......... I have wanted to open a bar and grill (I guess like almost every guy) since I was in college at University of Texas in Austin...... love love love your idea.... the big problem..is Argentina!!... whatever money you are thinking double it!
you must have enough money to buy the property..getting into a lease here will bleed you dry and the owner will screw you somehow.... the cost of a building is not cheap... that would be the only way to do it long term would be to buy the building........got to think of palermo barrio norte. recoleta and las canitas areas for the fixture of locals with heavy tourist -expat traffic but all of this up to you.... renting is still possible like taking this over at 90,000 dollars for the goodwill something like this
http://www.argenprop.com/Propiedades/Detalles/6969033--Fondo-de-comercio-en-Venta-en-Capital-Federal?hb=1
then the taxes and labor laws here are all crazy and nothing makes any sense.... as a foreigner the locals will try to either over charge you to death... bribe you to death or regulation you to death ..... they closed down a friends restaurant for 2 weeks since they had a squeeze ketchup bottle on a table... against the "health code"....
as others have said the supply and getting the products you need......I mean everything you are thinking about from food, dishes, beer, supplies, everything.... can you buy it here?? can you buy what you really want and need with the concept you have? something as simple as spices or barbeque sauce, buffalo wing sauce etc etc you cant buy it here so you have to be a chemist making this everyday...you have to be a great cook since you cant buy most products you have to make or grow your own
the thought of you not being here every day ...that is very hard... if you can find a family member or good friend..it could work... but you know business anyplace in the world when the owner is not there.... only bad can happen!!...
I HOPE YOU DO IT!! I would love to see it.... IT IS NOT ALL BAD...you see every day with bad service average food places making it.... so with anyone who puts some effort thinks about service, quality and fun should be able to make it!!!! I would help you out for free anytime to get it started.... I would think smaller.... forget the live music.. i know that sucks... but put on some cool dj music.. get some great steaks and texas food....bake potato mac and cheese some brisket... and some good beer... make it rustic,fun and different and just go from there.... if it works...then the 2nd one can have the live music and beer garden... cheers good luck to you!!! I hope to be sitting at your place having a cold one someday soon!!!!