Safest and easiest is to use the FEL and raise it up,crib under it and put the trailer under it. Any other way you are likely to destroy it in the move. With the FEL is shouldn't take long at all to lift and crib up.
The only other way I could think of would be to use two tractors and sling strap the building using the FEL to lift each end. One tractor backs up while the other drive forward, the same way one would use two cranes to move large objects. It takes a ground person to direct it and slow go + very coordinated drivers. This is assuming you have two tractors capable of lifting that high.
I would still vote for the trailer though, but if you had two tractors with FEL, just strap the main runners on each side lift with the FELs, back under the trailer, drop the load and head home to do the same thing in reverse to unload it. That is what I would do since I have two tractors with FEL and a brother in law to help me.