A citizenship point:Thanks, yeah, I was pretty set on the idea of going the direct citizenship application route, but I wanted to at least intellectually explore the idea of the student visa to make sure my citizenship approval chances were as high as possible. Thus, I wanted to find a multi-year Spanish school, as I don't think I could muster the drive to show up at any other type of degree or form of study. Sounds like it doesn't exist. No biggie.
Good to know that living without the DNI isn't too much of a hassle. If I end up getting married though I'd question what went wrong with future me
Be aware if you attain Argentine citizenship (while maintaining citizenship from your native country) The Argentine Government considers you to be an Argentine citizen when you are on Argentine soil. Your native citizenship, if maintained, has no standing in their eyes. In some cases, Permanent residency could be more attractive. It has been talked down here on many spots / threads, because you can do a lot of the obvious things a citizen can do, such as vote.