you cannot go below 8(or 9 I cannot recall)days off per month and you only get 11 on reserve. that said, you can try to go beyond 75 hrs by working your tail off but you will be hating life for sure. Staffing looks to be so bad that you will certainly be able to pick up open time but it cannot start before or end later than published times so as not to interfere with your reserve days. no easy answer. many FO's have had to mow grass or use other skills or marry the right person to feed the aviation habit. not to be a downer but suppose aviation gets hit with another 9/11 type event or some other carrier specific event that could force you to suck it up and start from scratch. are you gutsy enough to get in? I am not offering this to be sarcastic, believe me. it happened to me and the war stories, though exciting make me doubt the wisdom of putting it all on the roulette wheel we call a pilot career.