You sound pretty driven, so I assume you're aiming for one of the top Spanish programs like IESE, IE, or ESADE. Some schools tend to be more flexible with their work experience requirements. Others are rigid and won't take anyone with less than 2-3 years no matter what. I'd call 'em and ask what's up before paying the application fee.

Some schools will consider people straight outta undergrad, but you have to be exceptional. Perhaps your work experience will come into play. If your consulting was for more than one client (and not for your parents, for example), then maybe you'll get a serious look. The internships, too.