Are you using ublock origin? I don't know what secondary element this is, I don't have it in the script.
Yes, you can use the pc, I was running the script while working (with photoshop to be exact, which takes a lot of ram), and it works normally.
I don't let it run for a long time, I like to take 1 day premium at a time, because I don't download videos every day. But, from the tests I did, I would say that you can get 10 points of view in 10-15min (depends on your tor connection).