Chain drives are loud. My previous picture of the shop with the electric doors, very quiet. And they seal great, whether they were chain lift or electric motor lift. They usually sit in a side track that has seals, and the bottom of the door has a rubber bulb seal. The top is sealed to the building.
Your size is slightly bigger than my garage. Always better than working outdoors in crappy weather. You just need to get creative with storage! In my previous garage picture, there is actually 4 balloon tire bikes hanging right above the door. I just have them tied up horizontally.
