Can you explain a bit more what you mean by "bullet catch"? I have a feeling I'll get a deer in the headlights look when I mention this at the order desk at Home Depot where I plan on ordering the doors. I'm guessing there's one part of it that mounts on the jamb and the other part comes already on the door? If you know of anyone who sells them aftermarket perhaps I could print that info off and bring it to Home Depot. Thanks for your help.

taunton books puts out a book called the "DOORHANGER'S HANDBOOK". I have hung double doors with astragals in the middle, but I have not hung three door combinations in the manner you suggest. This book will show you how (or not) to implement your ideas. You may be able to buy a used one at a good price. I have made and hung many doors using this book as a guide.

The closet in my master is 29 inches deep. Then I have 3 other closets upstairs like this in my sons' rooms and the guest rooms. Those closets are 22, 23, and 24 inches deep. I'm standing in front of them now and thinking that if I had shelves on the sides and a bar across connecting them....well, if they were jammed packed like I have some of these closets then it might be annoying trying to move past the hangers to reach the shelves. It depends on how much stuff is in there. Looking at it now, I think I have actual "dead space" above my bar. There is so much room between the shelf above the bar and the ceiling that if I was to change my closet right now I might just keep the bar across and add cubbies above the bar for my bulky sweaters. I really don't find reaching into the side space to be that annoying. I noticed in my husbands closet he has his suits in the side space. He only wears suits at weddings and funerals. He also keeps the ironing board in there. We don't iron often. Apparently I never do bc I just now learned that's where we keep it. Lol. I don't think that little bit of "wasted space" is worth such a huge overhaul. As long as it's lit well and the doors are good (I can't say enough how much of a difference it was going from sliders and bifold doors in my last house to doors that swing open). And we have good lighting in the closet which makes it easier to see all the way into the side space. For the record, I hang 90% of my clothes. I only fold sweaters and undergarments. So having just hanging bar isn't so bad for me.

I'm assuming you've tried a basic Google search for "pivot hinge" and "90 degrees"? https://www.grainger.com/category/hardware/door-hardware/hinges/pivot-hinges?attrs=Range+of+Motion%7C90+Degrees&filters=attrs If all else fails, consider installing some sort of stop. There are stops you can put on the hinge pins of the hinges themselves, and then you can adjust them to where you want them. If you don't want to risk that the adjustment would shift, you can buy bolts to put on there (one on each side of the hole and then tighten them toward one another) Hinge-pin door stops https://www.homedepot.com/p/Everbilt-Satin-Nickel-Hinge-Pin-Door-Stop-15586/202033981