We're wanting to put internet service in our winter home in Arizona so that we can install 3-4 security cameras that can be monitored online when we're not there.

When we are there, we'd be running a laptop, an iPad, one smart phone and 1 or 2 TVs with Roku. Cameras likely wouldn't run much while we're there.

Internet options thru Cox Cable are "up to 30 Mbps download/up to 3 Mbps upload" and "up to 100 Mbps download/up to 10 Mbps upload".

$20/month difference in the package prices. Is the smaller 30/3 package enough to do what we want to do? 

Thanks for any and all opinions. 

Edit to add:  Options include renting a modem from Cox for $10/mo or purchasing our own DOCSIS 3.0 modem. Which is the better choice?