Hmmm, that was quite the project. At least it was basically square (not with lots of corners and angles I mean).
It took a second to realize that the foundation was a couple feet tall, and the missing floor was not at the level of the dirt.
I found this picture the most interesting...
I don't know why you put the 'runners' along the bottom of the joists. if there was a full basement below, I would assume they were for attaching the ceiling material, but since it's a shallow crawlspace, their purpose eludes me. However, that's exactly why I like looking at construction from other places, it's always a little different. Even from state to state here in the US, they build a little differently in every place. they use almost no wood in building homes in Mexico, which makes remodeling a challenge sometimes, but avoids most of the mold and termite issues we face here.
Thanks for sharing the photos, and I must say, it looks quite nice now that it's put back together. Good work!