Good points. I'll try to narrow this down a bit.
1. Do you want to be able to identify/capture license plates? In a perfect world yes, license plate capture would be great. Realistically I don't think this will work at night for the price range. I would like to see day time license plates on vehicles moving up to about 35 MPH. For vehicles I am looking for image quality that can identify make/model characteristics, color, and specific variances of the vehicle such as after market wheels, window tint, damage etc. Basically good enough that we can compare and make a positive identification of the vehicle. For night time this may be much harder but the goals would be the same. Basically we are finding price and ease of installation seems to be the biggest factors. We feel any video is better than no video but want the best quality we can get while making it affordable and simple.
2. Do you need to be able to see (and then be able to use this image for identification of) people's faces at 60 feet (both day and night)? For day time video, yes this would be ideal. The distance for a person on foot would likely be closer to the 30 foot mark for most homes. At night I would like to see at a minimum video quality to be able to hopefully identify race, specific clothing etc. Facial identification would be ideal but not necessarily required.
3. How much light do street lights provide in front of homes? Tough to answer this, every community home location can be different. We are in a dense city so there is always some ambient light. Some homes will have a street light right in front of their house and others may have one 4 or 5 houses away.
4. Have you explored any community or municipal funding for you project? This could either help the homeowners defray hardware costs or increase spending on better technology. Some HOA's and communities have collected money to purchase systems however there are many communities that can't come together like this or it just takes too long. My requirements are designed more for an individual home owner that wants to have video and help their community and the police when necessary. The City itself is investing in a video project for entrance/exit points from the City limits but at over 90 square miles, getting video down to the community level is an enormous task, especially considering we have limited access to fiber.
5. Have you considered the effort involved in managing all the video from all the cameras if an incident should occur - without the ability to do this from one interface? (i.e. a VMS) Yes this is a factor and has been problematic. However I think cost and ease of installation outweigh this at the moment. Looking more for something a home owner can easily download or at the very least provide the SD card so video can be pulled and returned to them or have the City replace the SD card completely should the crime be serious enough.