ORDERING THE PCB
I would also recommend to get your PCB manufactured at least 2 pieces. You can order your PCBs from PCBWAY as they offer 10 PCBs for just 5$. Check out their online Gerber viewer function.
This PCB is a single channel gateway of LoRa, You can use this PCB as a node as well.
1. is mesh?
2. is possible using this with solar panel?
3. please add normal usb host A for pendrive and storage