R6220 as dual band range extender

Thank you for your reply searay.

Find a way to locate the r7000 in middle of the house

Why?  It's working just fine from the basement.

run a cable upstairs

That would be difficult to do, especially since I am only renting the house.

purchase a WIFI repeater and loose many of the Speed benefits of the r7000

Both the R7000 and the R6220 have wireless repeating functions built into the firmware.  So why should I purchase another WiFi repeater?

Your cable modem can be relocated to almost any CATV outlet in the house

Sure.  But then the problem becomes routing the wired ethernet connections to a different location than where the router is now - or routing an ethernet cable from the cable modem to the router.

Another option is to use these  http://www.netgear.com/home/products/networking/po​werline

I could.  But again, with WiFi repeating built into the firmware of the R7000 and R6220, why should I purchase more equipment?

The remote location in question is my daughter's bedroom on the second floor.  She needs two wired ethernet connections - one for XBOX 360 and one for smart TV.  Since I need to have a WiFi bridge client up there anyway to provide the ethernet connections, it would be convenient to also broadcast a 2.4ghz WiFi signal up there for stronger connection around her bedroom.  Isn't situations like this exactly why Netgear included WiFi repeating into their firmwares?

However, I did get it fixed.  I started over from scratch, factory reset both routers.  Set up the R7000 first, creating the 2.4ghz WiFi channel 11, 5ghz WiFi channel 149, both set to max speed capabilities.  Enabled WiFi repeating on 5.0ghz channel (base) entering the MAC address of the R6220 and leaving the box for denying client associations unchecked (that seemed to be the problem).  Then I set up the R6220 with the WiFi channels I wanted, 2.4ghz on channel 1, 5ghz on channel 149 with the same SSID's as the R7000.  5ghz max speed, 2.4ghz limited to 20mhz because the max speed setting overlapped with the channel 11, and I want most of the 5.0ghz bandwidth used for the wired ethernet ports anyway.  Disabled DHCP on the R6220 and enabled the WiFi repeating function (client), left the same check box unchecked, everthing connects like it should now.

The R6220 still shows there is no internet connection.  I know if I enable access point mode that it will show an active internet connection, but everything is actually funtioning the way I want - so I am affraid to enable the access point mode :-).