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Earlier this year a fellow [befinitiv] started a personal blog that follows the development of his DiY Wi-Fi based FPV video system. It uses a unique Wi-Fi communication mode named wifibroadcast. Rather than repeat what he's written, I suggest starting here: https://befinitiv.wordpress.com/wifibroadcast-analog-like-transmission-of-live-video-data/ In summary, it is a low cost Hi-Def FPV video system with low latency. Range is expected to be about 1km with upgraded antennas. What is cool is that it uses easy-to-buy components and has simple wiring requirements (connect some cables). It should work with any FPV monitor or goggles that have an HDMI video input. BTW, I learned about this project last month from hackaday: http://hackaday.com/2015/06/13/wifibroadcast-makes-wifi-fpv-video-more-like-analog/ Here's a video of the developer's first FPV test flight from May 2015: I've ordered all the components I think are needed and the cost was well under $200 USD (for everything but a monitor). Below is a photo of the two boxed Raspberry Pi's and TP-link WiFi dongles that the postal carrier dropped off a few days ago. I'm still waiting for the HD camera and some cables to arrive. Then the fun begins! It's a good thing my recently built DiY FPV Goggles support HDMI video.