Do not warry, zt79, we gonna make it! As I see that in many towns in Czech republic Helium or TTN networks already available... Already in progress development of light TTN/Helium end-node, based on not expensive parts with target cost under 100 eur (including LoRa board, sensors, solar battery, accumulator and antenna). Replicate, expand! The source code with instructions will be available after testing. Stay tuned! DIY!