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DIY job, supply only for driveway gate

Hi There, I would like to know the price for a single swing gate 3000cm wide and height between 1000cm and 1700cm price dependent I guess. Would like it to come with a hinge carrying post, that can be bolted to a concrete base and a closing post with the same mounting. Not sure if because of the length it would require a supporting wheel at the end of the gate, advise would be welcome. Not sure if that matters, but i will be automating this somewhere in the future. I am more then capable to install myself. Look forward hearing from you.