Well, this once busy thread appears a little dried up...
I hope you'll enjoy Maella (lovely town, nice and friendly people, surprising amount of shops and bars
) and your finca.
The Spanish build roofs with concrete (absorbs the heat nicely), but that was no option for me since my finca has no access for a concrete truck. So I rebuilt the traditional roof with wooden beams and 'caņizo'-mats. To modernize I added insulation and tar paper under the tiles. A lot of work but you can do it by yourself. I hope most of the roof tiles are OK, because you need a lot of them.
I only spend the summers there, so I won't be around when you get there. But we can try to stay in touch over this thread and meet later, since we share the same 'dream'.