Otevan is Armenian for dwelling, so if he took them with him, it had to be a portable dwelling. I websearched for a while looking at the three possibilities, tent, yurt, or wagon.
Ancient peoples of Eurasia were all nomadic to some degree so you really need to see archaeological evidence from the very beginning of house building. For instance if you find stone house foundations mixed with stone rings, you have a nomadic people who lived in circular yurts, a type of tent with a skeleton. First they build stone barns and storerooms, then as they became more settled, they moved into them and expanded them.
But I found only a few possible stone rings in Armenia and not in a village context.
Tents take various forms but usually there is a subset of society that uses them long, long after people settled in villages. In Armenia that would be shepherds, but I didn't find anything that look like ancient tent designs.
And then I found this, which was discovered when the level of Lake Evan was lowered several meters for irrigation. In a cemetery this wagon.
Those curved lathes are evidence that it was used for living in. If it was just cargo, most people use no roof at all, like a bare pickup truck or flat deck, because you just move cargo when the weather is good, or you tie a cloth over it, i.e. tarpaulin, as needed. You only build a roof skeleton when you want it covered for a long time and the stuff under cover is not loaded and unloaded all the time. Like a Conestoga Wagon or Europe's gypsy wagons which also used to have curved roofs.
So, I expect that this was about some people from Armenia, taking there caravan of wheeled dwellings, south into the 4 hells in the area that we now call Iran and Iraq, a hot arid desert place where life was hell compared to the mountain valleys of Armenia.
And when you realize that angel, comes from the greek aggelos meaning MESSENGER, and that host means ARMY, you can understand that he took and ARMY to surround the 4 hells in order to send a strong MESSAGE.