OK, Natalie, I guess I don't need to explain "mounts". Mounting plants basically does three good things: It gets the plants off the floor/table/window sill, it displays the plants at eye-level, and the epiphytic plants grow more naturally, just as they do in nature.
Low-E glass is an interesting subject. Did you know that there are two basic types of low-E glass, one used in cold climates and one used in hot climates. The hot climate types do indeed reflect the UV from sunlight and prevents some/most of it from entering the house. The cold climate types actually reflect the heat back into the house, which keeps the home warmer. Thus, one has the coating on the outside glass and the other has the coating on the inside glass. That being said, I don't think tropical plants care whether they receive UV or not. Most tropicals, in nature, grow under a heavy canopy of limbs and leaves, getting little if any sunlight. There are literally 100's if not 1000's of greenhouses built with low-E glass. Plants grow in them just like they do in any other greenhouse. My conclusion: Don't worry about the low-E glass and since you'll live in the north, UV isn't an issue anyway.
Thanks for your kind words. I put in a lot of work on the site and yes, I am passionate about growing tropical plants.
P. S. I have shipped tropical plants to each and every northern-tier state, including Idaho. Houseplants grow there just like they do anywhere else. Ken