"they're always eating up bandwidth"
How are you determining this? To "eat" bandwidth they have to be sending the video over the network. They only do this when requested as in when you see them via your pc.
"I don't desire a static ip address"
OK. You do understand that bandwidth usage has nothing to do with an ip address whether static or dynamic? Presently the cameras are not being forwarded for remote internet access.
"Looking at picture I attached, can you explain what to do?"
Do what? You said you don't care about doing static ip on them
"or can I do something different then static ip?"
I answered that question with "To conserve how much bandwidth of your lan they use you need to lower the frame rate [FPS] setting"
In other words the better the picture you see is based on the Frames Per Second rate. More frames = more bandwidth. So by lowering the frame rate you can have them use less bandwidth.
Most likely you would find this under the audio and video or, most likely, under image setup