I can definitely see the benefit of having a screen room, especially the way the bugs are around our area in the summer......but coming from tent camping it just takes me back to that life for some reason and loses the
convenience of having our new TT.
There are some nice stand-alone ez-up style tent rooms available that are way less expensive and could be set up next to the TT or under the awning, just a thought. I would think a stand-alone style would do a better job of sealing out the critters, other than entry/exit times. We all even have the perfect picnic table stored onboard for the room.
Plus if a quick storm blows in expectantly like it does around here, you wouldn't have a sail/battering ram attached to the side of that nice TT 
.
$80 vs $600.
https://www.amazon.com/Z-Screen-Sier.../dp/B000FZVWDO