I don't really see how this should work. Ok, ventilation may prevent sheer condensation, but this could as well be done by an simple fan -without an expensive 'Bubble'!
In my opinion storage in a humid climate must include humidity control in one way or the other, in order to keep the relative humidity below 50%.
As you know a regular electric compressor-based dehumidifier does not work near the freezing point, so I got a tailor to make me an airtight 'sack' to store my Pagoda in. I then placed a number of perforated stainless steel cylinders filled with silica gel inside the sack. Silica gel can be recharged (dried) in an ordinary oven and used over and over again.
Mine is 'home-made', but the concept is as:
http://www.permabag.com/Future will show if it works! [:0]
/Finn
1964 230 SL Euro 4-speed silver metallic with black leather