Additional thoughts...
A couple of things to add for anyone that is going to try this. First, the power supply is going to be the most expensive part of the system unless you already have one like I did. I didn't realize how much those things cost now. The one I have is about $100.00. Also the cameras have gone up in price a little. They are more like $25 rather than $20. Another thing I would suggest is trying the setup to see if it works at the range before you add the external antenna. You may not need it with the cam 3 version. The cam 2 is good to about 100 yds without the external antenna from what I've seen. The cam 3 doesn't need the external housing either as it is weather proof on it's own. For that matter, the cam 2 doesn't really need the outdoor housing either unless you're going to use it in the rain. This setup has been a great solution for me and my old eyes.
A couple of things to add for anyone that is going to try this. First, the power supply is going to be the most expensive part of the system unless you already have one like I did. I didn't realize how much those things cost now. The one I have is about $100.00. Also the cameras have gone up in price a little. They are more like $25 rather than $20. Another thing I would suggest is trying the setup to see if it works at the range before you add the external antenna. You may not need it with the cam 3 version. The cam 2 is good to about 100 yds without the external antenna from what I've seen. The cam 3 doesn't need the external housing either as it is weather proof on it's own. For that matter, the cam 2 doesn't really need the outdoor housing either unless you're going to use it in the rain. This setup has been a great solution for me and my old eyes.