5 years too late, but if you are coming from the US or any other country that is not part of the EU and does not have national healthcare YOU CANNOT OBTAIN HIV TREATMENT IN SPAIN. That is a bold statement, but 80% true.
Here are some facts:
-HIV treatment in Spain is only administered at public hospitals
-You cannot use private insurance at a public hospital
-You cannot get HIV medications anywhere but at a public hospital in Spain
-No one working in the Spanish healthcare system really knows much about how to get care if you are not eligible for public healthcare - they aren’t even sure if you can pay cash
Here is a blog about the ongoing challenges of trying to obtain HIV care in Spain:
http://americanwithhivinspain.tumblr.com/