I wanted to find the snowglobe that's in the add-on, and I'm in the right location, but there is not a single door that's labeled "Salida Del Sol House". The wiki has NO specification, just that it's the southern most one. Help me please.

Check location map for cell changing named " Salida Del Sol House".
It's a door by the end of a some stairs.

Nada.

Can't find a local map so I can't help you, sorry.

Erm... there should be a video or something that tells you how to get there with left/right directions. I'm pretty sure it was on the Wiki when I was looking for it.

ex: You enter through entrance X and take a X then X then follow along the side of a building to X..

Well, after looking at a map on a youtube video, I could tell where the guy was, so I tried to get there, not caring what door I took. I went to Salida south, to the house, into salida north, and got the snowglobe. Now I'm completing this freaking DLC.

I found one "Sierra Madre" off a roof top.
I didn't go down the stairs towards the exit. Hopped over the wall and walked the roof tops to the left, found Deans Suitcase and a few desks with chips in it. The area is right before you exit before leaving the area and a beeping sound is there and toxic gas.

But why I go there ant ther isn't the snowglobe????