Don’t know whether it is relevant, but I have a spare concrete pad in La Palma. It’s 4m square, around 20cm thick and has been used by a European university physics department as the site of a robotic telescope. Power and ethernet are laid on but there is no other infrastructure right now. A Google maps image is available at https://firstname.lastname@example.org,-17.8677037,123m/data=!3m1!1e3 which shows the orange circle painted on the slab. To its left is Kevin Hills’ robotic observatory and to its right is mine.