User Manual Whynter ‎FM-65G 65 Quart Portable Refrigerator

It's like a large cooler with baskets rather than shelves. Two 5 gallon buckets, but quarts and gallons would fit better.

Yes you can, I kept mine outside for 2 months when I lived in my RV. I would make sure it was under a covered area to keep weather off.

The unit should remain in an upright position. If it must be transported on its side, it should be placed in an upright position for at least 4 hours.

No caulking in mine either. No smell in mine but it is in use all the time. I did notice a slight plastic smell when I first opened it but that is gone now.

A cabinet inside an air conditioned home where the vents have at least one foot of space, possibly, just remember it sits like a chest so in a cabinet you would always be pulling it out to open the lid, it does not stand on its side like a normal refrigerator.

Yes it does. Both inside the freezer and outside (you have to remove both to drain). Spraying the inside would not harm the electronics, however be careful not to spray the outside vents. When storing, I put one charcoal briquette (not matchlight, or you will get a petroleum smell) to eliminate any odors.