Welcome,
As for your humidity problem I read something that sounded interesting. Now I have not tried this my self so I can not say if it works, but I will try it when I set up my glass tanks. Most glass tanks have a lip around the top of the tank and someone said they had a piece of plexiglass cut to fit the top of the tank and drilled holes on both sides for airflow. In fact they had different pieces with different sized holes for when they wanted a lower or higher humidity. After putting the plexiglass in place they would just put the wire screen on over it. Sounds like it could work.