At only 56" wide, 2 doors would only be 24" wide or so. 1 door will be stronger than 2.
My big safe has 2 doors, its a pita to access the none lock side as you have to open the lock door reach in and throw a lever to unbolt the 2nd door. When i redid the shelving inside having to access that lever was very limiting on its configurations.
What started all this was i was looking for my extra long cleaning rod. That i thought was in one safe, well i had to open 3 to find it. I am super organized ( i may have been called anal a time or 3) not being able to find something i know i have drives me nuts. Then i started looking at the floor space taken up by these safes, the way i had 2 in the house and 3 in the garage. 2 big safes and a metal ammo locker just makes so much more sense. All but one of my safes i bought second hand.
Its funny how many issues you find when your spending most of time at home. I am still not use to it. The good news is i have been going to the range about twice a week. The gym 3 or 4 times and have been scoping at the local toy stores( all kinds) i wont say i dont like not working yet, but aspects of it are growing on me.