I got roughly 300h on my main world, which was also my first world. I have every armor and weapon on max level, got every trophy and I either have built every structure or can build the remaining ones.

With the experience I now have it could probably be done within 100-200h, depending on your luck with drops. For example I just recently got my first wraith trophy after countless nights in the swamp killing them.

I also got a black metal chest full of every metal available in the game except for flametal (I got 18 stacks but exploring more of the ashlands before the devs finish them would not be smart).