[CovertJaguar]

I've been thinking about how you could implement hyperspace in SEIV and I came up with this idea:

While it is not possible to set a time limit on how long a warp point lasts, it is possible to create an environment in which warp points are inherently unstable and would eventually collapse. This can done using events, by making a low severity event that immediately closes a warp point. You could then adjust the "Event Percent Chance" values in the setting.txt file to control how often a event occurs.

I have attached a zip file with a settings.txt and events.txt that demonstrate this effect. After a certain amount of turns after a game starts, in which I believe no events can occur and appears to be hard coded, a warp point will be closed somewhere in the galaxy each turn.

This would allow you to place warp-openers on say your mothership and use it to open a hyperspace gate that will close in a few turns. I think this is as close to the Homeworld system as SEIV will allow.