Ask Slashdot: Can You Install a Wifi Mesh Network in a Barn?

Long-time Slashdot reader pikester has a friend running a museum 'looking to make it more interactive for visitors.'

To make this happen, the museum is going to need to have good WiFi connectivity throughout the premises. The good news is that the museum is pretty small. The bad news is that it is located in an old horse barn with many metal walls. I'm hoping to put in a mesh network for him, but most solutions I've seen are pretty bulky. I'm looking for recommendations for a solution that is easily mountable in the building.

Long-time Slashdot reader Spazmania suggests it's 'not terribly complicated.' After setting access points to same SSID but different channels (and with the transmit power down), 'walk around with a piece of free software such as Wifi Analyzer and tweak the positions and transmit power on the access points until the signal levels look good in wifi analyzer.' But are there other solutions? Leave your own best answers in the comments.
Can you install a wifi mesh network in a barn?

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