I have something similar... I guess.
I have a cell booster that rotates from vehicle to vehicle and to my home sometimes.
Each vehicle has its own antennas, as does the house. My Verizon router goes right along with it. No problems. I've been doing this for about 7 years now. A power cord, a big antenna fitting and a little antenna fitting and I'm switched out in about two minutes.
The rv came with a booster and antennas so all I swap in is the router.
Buy a foam lined box and just do as you planned IF you can get service at the house good enough to bother with. Bad service is going to dictate if your booster will work better than your dsl.
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