My favourite part of the world. Ordesa national park is, for me, the 8th wonder of the world. I travel to Huesca 2-3 times a year as my late wife’s family live there. Can’t give any advice on buying/renovating, but I do think you will need to engage a local architect & lawyer. I wish you well. I would love to live in the region.The people are great. & you already know how stunning the area is. If you want to run a B&B who/what is your target market? In my experience, a large number of Spaniards from the region have 2nd properties in the mountains- Jaca, Panticosa, Biescas, Ainsa, Benasque etc (lucky buggers), which are used during the ski season or to escape for weekends, but they do like to have a choice of bars/ eateries nearby as, culturally they eat out, especially if they have down time. Summers are spent on the beach. Massive generalisation, I know but I have been frequenting the area for nearly 25 years & this is certainly the case for those that I have come in contact with.
How remote is the property? So would you be looking to attract Brits, Dutch, French etc?