Pretty sure you won't be able to place a bridge there again. Villager is too close and do is the fire pit. I've heard so many horror stories of people demolishing a bridge wanting to build another type of bridge in that same spot, but aren't able to because of villagers living too close to where the original was :/These are good questions. Additionally, does it affect town rating if you replace every native tree with a perfect version? I know that you had to have a certain number of native trees in Wild World in order to maintain perfect status.
How lenient is bridge building? Before committing to demolition, would I be able to move this bridge exactly one square to the right?