I believe your idea is nice when combined with what chadster766 suggested. Using the WRT1900AC with the wireless bridges will maximize the network capability. I am also making use of Powerline Adapters in my home, making use of the more stable wired connection. Check out this link.
My network is:
ISP Modem> Main wireless router>Powerline adapter><Powerline adapter+network switch in office.
Hope that helps. :catvery-happy: