Airflow inside the garage

Seasons greetings all.
Having recently bought a 1998 F355 GTS I’ve put some thought into getting a Carcoon or similar to store it in over the winter. The trouble is my garage isn’t really big enough for it so I was wondering.. The garage has a pitched roof which is boarded and insulated with 75mm 3 inch Celotex boards between the joists and a foil / bubble wrap type of film on the roller door which works surisingly well. The difference since I did the insulation work is remarkable but it got me wondering about air flow in the garage now. I have a 100mm 4 inch air vent through the cavity wall but there isn’t an awful lot of movement of air to be honest.
My question is whether buying one of the replacement fans and foam filters from one of the various Carcoon manufacturers and fitting that over the hole would work in a similar way as it would surely introduce a steady flow of air into the garage which, as far as I’m aware, is how these things keep moisture levels so low.
Thoughts anyone?
Thanks

 

I’ve got one but my understanding was that the air flowing results in low humidity and I reckon a fan would be a lot cheaper to run?

 

https://inthegarage.com/how-it-works/
A constant airflow is what it is that keeps things dry