One Night Only
Prison Bitch #24604
For me it was around the time of the bloody baron quest, so a good few hours.
As for all the tedious stuff, you don't have to do any of it at all. In fact I'd recommend not bothering with the oils/perks/crafting too much after the early game (unless you have to for certain enemies), as it all becomes way to trivial anyway.
I agree with this, the oils and stuff aren't needed of you're not playing on hardest difficulty anyway.