I admire the elegant storage arrangements for your bike. I ride all year when it's dry (ish), the problem I had was with condensation in my pre-fab concrete garage. Water would drip off the bikes and when I had a Triumph, every switch had a problem at some point. My original garage was old so I had a new one built but it wasn't unusual for the rH in the new garage to be 85-90% (October-March). I decided to make an "oxygen tent" with a dessicant dehumidifier inside, both bikes sit on dollies, nose to tail. The humidity is set to 60% rH which seems to be low enough to stop stainless headers from developing the tarnish spots. It's not pretty but it works.
The Zed is sitting behind the SV, the white box behind the SV front wheel is the dehumidifier. I used to have to open up the plastic to empty the water tank every 36 hours but I recently added the tubing to the washing up bowl so it will now run unattended for several days. Eventually, I'll continue the plumbing to the outside - the garage manufacturer says drilling the walls invalidates the warranty but I have an electrical ingress point near the front I'll be able to use as a drain. I miss the low humidity of CA and having a double garage.