Hi. I'm Dutch John, and new here.

[Dutch John]

Welcome aboard Dutch John, you sound like you're seriously into your safes if you're considering a double door 4 tonner from a bank!

With good preparation, a good plan how to do it, and the right materials, it can be done.
I have one, weighing about 1 ton, which I managed to get off my small trailer alone, with only a winch, a heavy crowbar to lift it somewhat, some wooden beams, and steel pipes to roll it on.
My Mancave is in the garage. I 'only'
have to pull it in.
I have one winch which can pull 3 tons.
I only need the space for it.
Sometimes a safe like this is for sale in Germany for 1700€.

[Huw Eastwood]

Yeah I'm with you there, I also had to work alone on some of the big ones, you soon find out what can be done with just half a dozen heavy rollers, a large crowbar, and a pile of hardwood blocks.

We had a Dorvic Roller pry bar for the big jobs and I never failed to lift anything with that, the only problem was the space needed to lever the thing as it was over 2 metres long.
Wouldn't have attempted a 4 tonner with it though, not even back in my powerlifting days!

[Dutch John]

Yeah I'm with you there, I also had to work alone on some of the big ones, you soon find out what can be done with just half a dozen heavy rollers, a large crowbar, and a pile of hardwood blocks.

We had a Dorvic Roller pry bar for the big jobs and I never failed to lift anything with that, the only problem was the space needed to lever the thing as it was over 2 metres long.
Wouldn't have attempted a 4 tonner with it though, not even back in my powerlifting days!

When I can't do it alone, I need to hire some help to do it.
It's enough when you're able to lift it 5mm at a time, then put some plywood under it.
Only need to lift one side. And I weigh 130 kg, so...
Some pulleys and rope would be handy.
It multiplies your power 7 times when you use 3 wheel pulleys.

When I don't have all this stuff, and have the space also, I wait with that safe.