RE: big 3 based routine advice
I've got a routine based around the movements you have got...
Bent over barbell rows
I'll also add in a few sets of dips to Session 1 at the end to fatigue myself fully. I train all these mevements 5x5 and each session lasts approx 45min. It doesn't look a lot but trust me I work hard on them lifting heavy all the time and it requires a lot of energy to get through the sessions. I've made some good strength gains already and am really happy the way it's progressing. As for frequency, I tend to have 2/3 days off in between sessions so I end up training 3 times per week.