Multi Turret Script for ship

Hello guys I'm back again. trying to figure out a script for turrets on a warship. Now I have two things to ask. Is it easier to have or not have a rigidbody pivot point for rotation (mostly looking at no rigidbody pivot points for this if it's easier). I have looked at both in the past from assets in the store that I have bought but their for tanks and don't like having multiple turrets on one in a scene. :(

Next. With the target for the turrets to aim or land on anything with a collider. Ok..... this was the part that got me because I used a script like that in the past off the physics tank controller by cobbi (think that's how you spell that) and it use a system like that by placing the target on anything with a collider. And the target was moved around when the camera moved. landing on anything with a collider and aiming the guns. it also was compatible with multiple turrets on a tank (didn't like not being on anything but tanks, tried :( ). I have looked through unity question and haven't seen any like this so hopefully someone can help me with this. If you can please don't be shy. I can't script for my life. And really want to learn soon.

thanks