Second safe questions

[Uffdaphil]

I'm considering a second smaller safe for long gun overflow amd would like to bolt them together. How difficult would drilling 4 holes through one side of each be? What kind of drill bits to use? I figure to rent a heavy duty drill. My current is a Liberty 5'x30x22.

[alamo5000]

Sounds like more trouble than it's worth. Why not just get another safe and leave it be?

[DeviantLogic]

Why not just bolt them to the foundation?

[Uffdaphil]

I just thought they would be more unweildy to cart off as one large unit. Especially the smaller lighter one. I should relocate to my bedtoom to bolt to floor over utility room.. Where it is now is over a long heat duct running beneath a finished ceiling.