Sanity check/hardware for pfSense as 3G WiFi Hotspot
I'm wanting to create a portable appliance that I can take with me and plug in to essentially act as a WiFi hotspot that users can connect their device to, and once connected they will be taken to a captive portal page and then provided with internet access. I have used the captive portal aspect of pfSense before, but I am less familiar with the WiFi/Access Point and 3G/4G WAN capability.
From what I have read, I can use one of the ALIX or APU boxes with a PCI-E WiFi card and USB or PCI-E 3G dongle. I can then create the WAN interface (actually PPP?) on the 3G dongle to provide internet access, and create a LAN interface on the WiFi card to create a wireless access point. Then configure captive portal, etc. Does this sound correct?
Finally, I want to attach a Raspberry Pi running apache to one of the ethernet ports and have this on the same LAN/subnet as the WiFi card. I would serve some local content from here. I can't see this being a problem?
Does anyone have any hardware recommendations in terms of the device, WiFi card, and 3G card or stick?
I was thinking along the lines of this for the box:
with this WiFi card:
and then a Huawei E1550 for 3G since I already have one and it is listed on this page as known working:
Many thanks for any guidance or thoughts.