Use of an airGateway as CPE and/or with a ToughSwitch for multi node management and 'deployable units'.

I recently began thinking about possibly using an airGateway here in my QTH as the number of Nodes will soon grow from one to 3 or 4.

Wondering if the 5 port ToughSwitch and an airGateway will permit me to have a separate 802.11n SSID I can change to whenever working on AREDN.

In the opposite direction, can we utilize airGateways as dtd'ed CPE for temporary SSIDs for use at Deployment sites and Demos?

I don't really want AREDN and my primary QTH wlan to intermingle, especially since my 'inner' wlan also uses 10 net DHCP addressing.

I anticipate using one or more Raspberry Pi or similarly efficient I/O and cpu 'single service' computers to provide SIP, ownCloud  and ???? services for AREDN purposes. 

If they are not duplicated here,  possibly doing some efficient syncing or replication with multiple other instances of same where the links are adequate to assure immediately deployable installations of a standardized set of services synced with several other 'deployable units'  (go-boxes?) in the area.
Everybody involved gets multiple offsite mirrored backups <g>.

​128GB USB 3 thumb drives are down to about $35 ea.
​
It almost seems too simple to be possible.  

Anyone doing this?
Suggestions?
Cautions?

TIA & 73
...dan wl7coo