We’d decided to trek with World Expeditions and using the tents was one of the reasons – it means that they employ 25% more local Nepali people, which helps with income in the area, they’re also more environmentally friendly than building more teahouses. There were a few teahouses that we did stay at, where tents weren’t feasible, but the tent, beds and toilets were a whole lot more comfortable (and warmer) than the teahouses. – there’s more on the World Expeditions eco camps here – https://worldexpeditions.com/Thoughtful-Travel/Nepal-Eco-Comfort-Camps