Is there any error message on the phone/ipad?

Your third idea won't work, it is infeasible because one modem allows only one router to dail-up. Since the C9 has no VLAN function, your second setup is not security at all. So the only available...

When wifi drops, is it shows disconnected on your phone/laptop/tablet? Or it keeps connected but no Internet availabe? If it keeps connected but no Internet availabe, you can try disable IPv6 on the...

Do you really have a belkin 500 in your network? If not, it is a problem of your PC. try reset the network settings by re-installing the network adapter driver. Besides this ridiculous display issue,...

@beeceegee If you do not switch channels, it can keep streaming steadily, right? If yes, it could be what @zetm said.

Too little investment for such a high goal:(.. If you do some research from Internet, you will know it is a huge project to deploy such a large scale wireless network for 500 homes and small...