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I'm well into my first scene, but I've been stuck on a few key pieces of logic for awhile now...These are a bit lengthy, so bear with me-

First:
How do I make something start as visible, then when a certain interaction is made have the object become invisible, then become visible again when a different interaction is made?
I have the interactions themselves all figured out and working. However, when I add anything to the visibility of the object I want to disappear temporarily it always starts as invisible until the first interaction is made then it becomes visible, then becomes invisible again when the second interaction is made...the exact opposite of what I need.
I have tried Timers, Switches, Signal Generators, etc. I have tried them plugged into the power of the object and have tried them plugged into the visibility of the object. It seems as soon as anything is plugged into either one, that object automatically defaults to an invisible state, with no way for it to start visible then have the signal tell it to become invisible.

Second:
I have an object that floats in the air and follows the player, unless the player gets too close then it flees a small distance away. This object also has a look at rotator so it is always facing the player. However, I want this object to only stay in a specific area while following the player.
I have tried creating an invisible wall around the area I want the object to stay, but it phases right through the wall. I have the wall set to collidable as well as the object itself set to collidable. I have tried all manner of combinations on the object using "Collides with..." and "Labels" yet it still phases right through everything. The invisible wall works fine blocking the player though.
I have even tried putting a tag on the wall for the object to flee from, but it phases right through. Also tried setting the object to moveable, but then it drops like a stone even if density is turned to 0 or ignore gravity is applied.

Any ideas why it won't work as I want it to?

Third:
This is also with the object mentioned in the second problem. I want the object to be connected by something like a "rope" (which will be visible to the player) to another object. However, the object ignores any length set on a string connector and travels however far it wants in order to get to the player. Even attaching it to a pre-made "rope" like item that is multi-segmented just makes it stretch the premade item and continue on until it reaches the player. How do I make it so once the string connectors length is reached, the object that follows the player stops?

Thank you in advance for any and all help! Hope I described everything well enough...