Well, POTUS this morning is tweeting he’ll move the GOP convention from North Carolina if he can’t have a packed convention.
He’s probably doing that because NC is probably threatening to restrict the convention. Those things are planned way in advance, you can’t just move them. We had the 2016 Republican convention here in Cleveland where i live. There was a huge amount of logistics involved in it. As much as he’d like to host the convention at Mar-A-Lago, it’s not happening. If he does move it, it will be a huge mess wherever it’s moved to.
You’re right. It probably takes at least a month to prepare the place, along with infrastructure outside the place. Travel, hotels, other buildings needed, etc., add more. It’s not the Olympics, but still big.