My 2 cents...I've been at a legacy 2 years and I have 18 days off this month. Some months I have more (vacation months). It's certainly easy to bid a low credit flying line and get max days off. That's what I do. I'm still getting 75 hrs of pay with that schedule with the ability to easily pick up more if I need the money.
I have plenty of time to be with my family. 30 days would be perfect but impossible unless you win the lottery.