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I would think that dismantling and re-erection would be far cheaper.
If you want to lift it you would have to pay for the crane and crew, all the preliminary work to stabilise the structure before the lift, then all the work putting it down at the other end. I couldn't hazard a guess, but my initial thoughts are expensive, really expensive.
A working bee of IISers to help dig and pour the new foundations would be a good idea? If you get enough people you could even dismantle the old structure as well, then reassemble the following weekend.
Pick a weekend and have an impromptu star party as well. You'll need a concrete guy and someone who can tackle the engineering problems as well.
Cheers
Stuart
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