How long do you think it would take to study for technicals?

2-3 weeks if you can dedicate a bit time every day and are above average in memorization and critical thinking. You could probably memorize all the basic questions in a week, and then spend the rest of time practicing non-standard interview questions.

Technicals aren't that hard tbh 3-4 weeks, 3-4 hours per day but ymmv

If you have no prior financial knowledge, maybe 4-6 weeks with several hours per day. It’s not rocket science but don’t underestimate it, finance students still fail those interviews. Once you’ve learned it once, you can refresh it in a day or two

Half a day. It's not difficult. Also be smart about it, find out what sort of questions they are likely to ask and learn those.

Depends on how pressing your interview is and how much you give a shit tbh.

Personally it took me 5 nights (all the guides and the 400 questions) but I don't think I slept that week. it's doable, just not advisable

If you have entire days, I think you can seriously make a dent if you have 3-4 full days

Dude what does it matter you already have a second round scheduled. Just grind it out. Worst case you over-prepared, not a bad thing