No safe will ever be big enough to store all your finest, but they can get too big to handle easily.
Get one like you mentioned...............then another....................then another......................well, you get my drift
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A friend of mine has a really old safe, only place he could put it is his barn. It has 2 doors, each weighs 1500 lbs!! He had to take them off to use his small tractor to place it inside his barn. IDK what the total weight is.