Need help with new small mining rig

I'm looking to build a small rig. Was looking at getting 2 1080 ti. Probably expanding to at least 2 more 1080 ti (at least 4 total) after a month or two. Any recommendations on mobo, psu, cpu, etc. Completely new to this. Have been reading around for a while, but still need help. Also if you guys think it would be a good idea to stick with 1080 ti's or if I should switch to other cards. Any help will be appreciated :slight_smile: