Maybe there are less expensive alternatives out there?
That's a cool setup aidwilli !!
I opted for a slightly different approach with the primary goal being maximum range so that I can access hotspots even when I'm parked a long distance from them (several kilometers easily).
For the antenna/point-to-point bridge, I am using a
Ubiquiti Nanostation M2 ($88).
Note that
Ubiquiti's LocoM2 does exactly the same thing with a bit less range (still a couple Km) and only costs $48.
For the access point inside my TC I'm using a tiny
Ubiquiti AirGateway ($24) and the combo is powered by a low cost
passive POE injector ($6). I'm injecting 12Vdc so no power converter is needed.
The downside of my setup is that the NanoStation's antenna is directional, so I have to re-aim it toward the nearest hot spot every time I park... I occasionally mount it on the TV antenna mast to make the process quick & easy.
As far as "less expensive alternatives"; the combo of a LocoM2, AirGateway, POE injector, plus a couple ethernet cables, can be had for under 90 bucks.
Cheers,
-Mark
On edit: Here's are links to Ubiquiti's
NanoStation and
AirGateway product lines.