I'm looking at picking up one of the portable skilling stations in the event (e.g, portable range). However, the wiki says they 'disappear after 5 minutes'.
Does this mean that they are gone for good? Are these one-use items? Or do you just re-deploy it and you're good to use it again and again and again?
You are able to use additional portables of the same type to extend them. If you want to use them for 30 minutes, you would deploy one and then use an another five to extend the life out an additional 35 minutes. You can extend either portables you have placed yourself, or that others have placed.