At the moment (2018-04-23) payout is not automated and gets executed by hand multiple times a day. You can see recent transactions here.Fee: ~1%, I simply choose an integer that fits, at the moment NIM reward per block is 4350.
You have to compile the source yourself, there are detailed instructions. You have to install some additional stuff to do so.The binary packages are precompiled. There are different versions for different cpu architectures, choose the one that matches.