Got this thing at Costco.. not saying it's the best. But it's good "bang for the buck."
A hand truck and a buddy could easily move it up and down stairs. Just put a 1x2 or something under the front of it to tilt it back a bit if you can't bolt it down so it doesn't fall over on you when you open the door. Or keep the metal frame it sits on and foam pad the edges so you don't kick them and stub your toes. Maybe add weights underneath it to hold those feet down. Most safes have very heavy doors and 90% of that weight is the fire protection. Anyway you can get more than one of these if you only have so much space, or have stairs to deal with. They weigh 245lbs empty. That's not terrible to move around on a hand truck with a buddy to help. Most couches and furniture are more of a PITA to move than one of those.
However they seem to be very prone to making your boat tip over and sinking quickly to the bottom of a lake.
A hand truck and a buddy could easily move it up and down stairs. Just put a 1x2 or something under the front of it to tilt it back a bit if you can't bolt it down so it doesn't fall over on you when you open the door. Or keep the metal frame it sits on and foam pad the edges so you don't kick them and stub your toes. Maybe add weights underneath it to hold those feet down. Most safes have very heavy doors and 90% of that weight is the fire protection. Anyway you can get more than one of these if you only have so much space, or have stairs to deal with. They weigh 245lbs empty. That's not terrible to move around on a hand truck with a buddy to help. Most couches and furniture are more of a PITA to move than one of those.
However they seem to be very prone to making your boat tip over and sinking quickly to the bottom of a lake.