[teraku]

I think with WK getting to 1.5k - 2k is possible in 1-2 years if, as OP said, you invest a lot of time every day. I noticed that if I could keep my usual pace every day I would complete it in ~2years. But since I do take breaks, have better and worse days, I am at a 4-5 year pace. I am at level 32 and about 2.5 years in.