[lime-users] Cheap commercial routers and interface+antenna in spain

Hello. There is a festival here in the city of Alicante called Alacant Desperta (https://www.alacantdesperta.com/ (https://www.alacantdesperta.com/)) totally self-organized and without money and there is a proposal to make a TV/Radio streaming during the days of the event. The place where it happens is a grat park in one of the castles of the city and there is no internet connection, Then one guy offered his connection that is in a roof of a building very close and with clear vision to the park. The idea is to use between 2 (a simple link) or 4 devices (if we distribute the network) using libremesh in order to have access to internet in different points of the park and also to promote and show the use of communitary networks using apps like ring to communicate without the need of internet (p2p). I would need advice about routers and network devices with antenna to do the link between the two points in a reliable way. Would be great if this devices are easy to get in the second hand market (like wallapop or ebay) because there is no money for buying and we are going to collect between a few guys some € to spend in them. Thank you very much :-)