Sounds like the camera option is not for you. There isn't that much storage, thus the maxing out. I would suggest that you get an independent camera system which stores pictures on its own included hard drive, and let the security system just protect without cameras. These systems are very cheap.
Regarding your other question, is your system encrypted? Maybe others in the vicinity are using your signal. In addition Ive read that extenders slow up speed significantly. Since your home is so small, you shouldn't need them.
Regarding your other question, is your system encrypted? Maybe others in the vicinity are using your signal. In addition Ive read that extenders slow up speed significantly. Since your home is so small, you shouldn't need them.