Extending Wi-Fi by 800m to Sports Hut
Currently running a staff wi-fi network using 50 x Buffalo routers running DD-WRT which gives 100% site coverage and a smaller student wi-fi network on a different VLan.
The PE department are now asking if it's possible to extend the staff wi-fi to the sports fields which is about 800m away as the crow flies. It's mostly fields between the two and if you stand on tiptoes on the roof of the main site you can see the hut so a fairly good line of sight.
What do the fellow geeks of this fine forum suggest as the cheapest way of extending the wi-fi that far? The hut is secure and has it's own electric supply so no issues with putting in a cabinet or leaving equipment powered on. All they want to do is run a RDP connection back to do the registers either on their ipads or netbooks.
Any ideas gratefully recieved