I've actually looked into this drone-based internet delivery method, and it's quite fascinating. Schools in Wisconsin have started using drones tethered to the ground to act as flying cell towers, providing internet to students in rural areas. These drones can stay airborne for extended periods, offering a flexible solution to connectivity issues. From what I've read, they can adapt their altitude to optimize coverage based on the terrain. Regarding weather reliability, while the articles didn't delve deeply into specifics, it's reasonable to assume that severe weather could pose challenges, as with any aerial system. As for costs, the initial investment might be substantial, but considering the expenses of laying traditional infrastructure over vast areas, drones could be a cost-effective alternative. If you're interested in a detailed case study, there's an insightful article on how drones are being used to bring internet to students in rural Wisconsin:
https://uavcoach.com/drones-rural-internet/ It provides a comprehensive look into the implementation and considerations of such a system.