The air quality has to be perfect

My brother Indigo is a hippie at heart and in spirit. Indigo frequently goes backpacking all over the world. He goes from couch to couch and takes really low key jobs. Basically all my brother wants to do is see the world, experience new things and play his guitar. He has quite the extensive guitar collection since it is his passion. The problem is that with a hippie lifestyle, he can’t take all of his guitars. So I got stuck storing Indigo’s guitars. They are really pretty, but they take so much space that they have their own room. My brother then told me that I had to monitor the indoor air quality for the guitars. At first I thought my brother was full of it, but then I did some research. Too dry or moist of air quality can seriously affect a guitar due to the wood. The dry air quality would cause the wood to split and crack. Too much moisture in the indoor air quality would cause the wood to swell and warp. The guitars would be totally ruined if I did not have both a dehumidifier and humidifier. The dehumidifier is sued with my air conditioner in the Summer and the humidifier pairs with the furnace in the Winter. That is right, the guitars get quality HVAC per season too. I have to for the guitars and because of the amplifiers too. They would get ruined with excessive static and poor temperature control. I don’t mind storing the guitars, but investing that much money in them is annoying.