I haven't chosen a focus, so there's no ending for me, and no pressure to overspend on an item because it completes my focus. I just go for anything I like the look of, although I do like Palitoys, I will only go for one if it's a good price.
I've now got a nice little collection of MOCs, but no more funds, which in a way I'm glad of, as it's calmed my mad spending down.
Just look at that run of Stormtrooper MOCs Jake Repas on Facebook has. Looks like about 50 different card backs. Now you think about that and 97 different figures - how could there ever be an end to collecting?
I do not have the money to buy everything I want and if I had the money then I think there would still be many rare things out there that is hard to find.