All of the plug-in Z-wave devices are repeaters, so you could strategically place one or more of them to get the signal across.
Right now the Almond+ is the nearest zwave device to the building. (I'm guessing) The building NW corner is about 50 feet SE of the Almond+. But line of sight would be through 4 wall's, one being brick. The way the building was built it is a giant faraday cage. There is a lot of rebar welded to plates, inside piers, that all the metal ultimately attaches to. The act as a Ufer ground.
I don't think distance will be the issue, the fact that it is a metal building is. I have not testing any zwave yet, but as I said, my Echo could not connect. It could be a combination of metal building and distance. So I know I will need some sort of access point. What I was wondering, does Almond that supports access point also relay zwave?
I do have a power strip controlled with zwave device. Now that I have some power into the building I could do some testing with it.