There are components available that just about anyone can start a game cam company these days. We see them pop up and down all the time. There are a few proven companies at the high end of the market and a host of mid to low end cam companies. There are basically 3 evaluations to do. One is the design of the camera and the components being used. This includes things like coating boards and designing a case the excludes moisture as well as the guts. Second is the production. Most companies sell cams made in Chinese factories using inexpensive components and have very poor quality control. The third is the company itself and how stable it is. What is the warranty (if that matters in your application) since most cams fail in a year or two. at the mid-range and below. Is the company going to be around to support the warranty a few years down the road.
So, unless folks have hands-on experience with these specific cameras or have done a deep engineering dive, most of what you hear will not be well based opinions. Things like "average cell bill" have no meaning. Most cell cams decimate the crap out of pics before sending them on the network to save cost. Very few transmit full resolution pictures. That may not matter at all depending on your application. The most important thing is not to start with a camera company, but to start with your application and figuring out what characteristics are important to your application. You can then apply those to the cams in the market and get down to those that will fit your app on paper. The analysis from the previous paragraph applies next.
Thanks,
Jack