look in the phone book or blue book for machinery movers. they are also
called riggers in some places. if all else fails, call a machine tool dealer
and ask for a couple of referals.
riggers load, unload, move large HEAVY precision machines on a daily basis.
to give you an example of size, 20' long, 15' hight press brake for bending
steel plate weighs 80-100 tons.
often they use machinery dollies which are in effect short in height, large
in plan area endless belts of rollers.
i would imagine that they would use the dollies under the unit and a large
tow truck as a deadman and winch it down.
trying to coordinate 3 fork trucks does not sound like a good idea.