That's a LOT of cooking!
No cooking. Plug in your crock pot / slow cooker and forget about it. If you start it after you cut your chicken, cook it over night and the next day throw in some roughly cut veggies, and half to a whole day later (make the times convenient for yourself) strain it all and save in fridge and freezer. Lasts about a week in the fridge but I like to freeze broth in solo cups because then you just cut the cup open with a scissor and drop the frozen broth in what you are cooking, or thaw it.
So it sounds time consuming but you don’t need to pay any attention to it. If you only cook your broth for 8 hours, fine, but 1.5-2 days gets the most out of the bones and then the veggies. Make it fit your schedule. Make it easy!