Someone certainly got off on the wrong side of the bed this week. Why so defensive? Keep in mind that you are asking for money, free workers, and pilgrims to build you private home. And keep in mind that to get that marketing is key. So if the target demographic tells you they don't find it, it doesn't matter how much you huff and puff, your target demographic can't find it. Do you want the donations, workers and clients?
Taking your points, one by one: a) Brierly guide: not mentioned in the elevation map, mentioned on the road map, but only as a yellow dot, except for Esquirotz that gets an extra F for fountain. Page 80 in my edition only reads "From the medieval bridge Puente de la Rabia continue up a concrete path and continue over a stream to climb above the bleak Magnesitas industrial complex and through the hamlets of Osteriz, Illarratz and Esquirroz (F) and covered rest area and along the Agra valley to: '.... and then a number of places are described in detail. 2) Pili Pala Press: "As the factory buildings end, turn right to walk down a flight of steps. Keep straight at a junction, cross a small stream and continue a path paved with flat stones uphill towards the village of Illaratz, which you'll reach in a km. Follow the minor roads to the hamlet of Esquirtoz 1 km away, which has a fountain. On the other side of Esquirtoz ...." . 3) The Eroski site: "Km 2,9. Ilarratz - Ochocientos metros entramos en Eskirotz. Km 3,7. Eskirotz - A escasos dos kilómetros se encuentra Larrasoaña. Pueblo señero de la ruta jacobea, vertebrado por la calle San Nicolás, que debe su origen a la fundación de un monasterio en el siglo X. So while there is a mention of these hamlets, please be so kind as to forgive the poor pilgrim who can only register so much and might remember places with cafes and algergues more than a hamlet you walk through after walking through a horrible factory (which non of us will forget I'm sure, but not in a good way).
There is also a difference between asking a question and questioning. But the more I read the more I question. When I asked in my response to your post if you were a church, group of volonteres, " friends of " I was simply asking a question, because your post did not have a preamble, an introduction. There was no jugement. But to understand better we just had to go to your website where you asked for money, a website that gave an address not on the Camino, as you explain now so well. You now tell us "If you haven't already grasped this, it is to be our family home", well clearly your target audience did not get this in your first post. On purpose? And I am not the one asking for money, or free labour. (I fundraise for a living, so perhaps I have less tolerance for people who ask for money without fully disclosing. They they create mistrust in the public, and rightly so, and then reputable, responsible charities suffer, but that is a whole other topic). Who am I? A 40 something woman who takes off 3 weeks of vacation every year to walk the Caminos, and always for different reasons.
As you said, your private home, so yes, put in the work, and be clear about your agenda when you ask for contributions. Then people can make enlightened decisions. Mind you, with this time of response I can't see people lining up to help you build your business. I think the more you berate your target audience, they few visitors, and workers, you are likely to have. Again, marketing, marketing, marketing.