I have no idea what the construction is of the building is,
your talking 70 feet is the 70' and orientation of the building in the same direction, or is a turn in there?
I think regardless one will have to build a few truss, or box beams to go a cross the building to keep it integrity I would think 4 foot tall to keep it with side to side stability and then X bracing (cables or some thing from corner to corner),
once lifted I would also probably reinforce the bottom plate or a gluelam, or 2x12 attached to the bottom of the building to keep the bottom from breaking or pulling apart,
carefully jack up the building side to side should work, (I helped move a few building one year with a professional building mover, (and one thing was to lift it evenly, so you did not twist it or bend it,)
use cribbing for blocking so it does not fall over when jacked up,
once up, one can put down planks and use sections of pipe to roll it on, if your planks and path is level,
(our house was moved this way over 100 years ago to it present location, the planks are still under the house).
by feeding the pipe in the front and taking them out from the rear and moving them back to the front,
If all in a straight line,
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now if you have a turn one will have to lift the building and put some type of rolling stock under the unit,
when we did the building, the mover had huge I beams that were chained and he used a special jack to clamp the chains, but on the one barn he had about 4 or 5 cross members, under the building and then two main beams the length of the building, they were spaced about 20 or more feet apart, clamped on to the cross members, then trucks were placed about 2/3 of the way to the back, the main beams stuck out of the front, and a cross member was clamped on to the main, and it had a pin for a fifth wheel, backed under it with a huge old of road semi type tractor, and when ever thing was ready at just a walking speed we started off for the 8 miles we were going, a few walked and watched along the side, the electrical company shut off power line and helped lift them over the building, or took them down,
when we got there maneuvered it over the new foundation and reversed the process, taking apart the I beams and lowering the building on to the foundation,
we also did a house, that summer, more care as any movement would crack the plaster,
(in both cases, I was not working for the mover, but the people moving the buildings),
Moving USDA quonset building to farm - YouTube
there are semi trailers that are over 40 foot long, that could be a possibility,