Some great observations from those who have obviously been there @darkwasthenight @dreamadream99
I started my band three years ago, and I was intent upon having a horn section. I read, but my chart skills are slow at best. I would be hard-pressed to be the MD with the other musicians and vocals plus manage the horns. Just too much work. I quickly realized I needed a horn section leader.
My problem was, out of the many horn players we auditioned and offered the gig to, none of them wanted the section leader tag. They were more than happy to show, blow, and get paid, but no one wanted that additional responsibility. I even spent around $600.00 purchasing charts, many of which were note-for-note accurate to the recorded versions we play. But a good number would have required some edits for our chosen arrangement.
I finally gave up and sequenced the horn parts. We were gig-ready, I wanted to go out and entertain and make money, and I couldn't wait around for a horn section to magically form and a leader to step up. We always bring in one of our favorite horn players who can play right along with the tracked horn section and solo his ass off when called.
Having played in a couple of horn bands, I can tell you that bar band pay alone probably won't keep 8-12 people interested for long. Most of the good horn players in my neighborhood expect to be paid better than that in the aggregate. So you had best be able to book some lucrative private events (upscale, corporate, weddings, etc.) to offset the bars. You might get more good players to try and be available and take your gigs seriously. The horn players I know can easily clear well over $125.00 a night playing with a jazz trio, so in those terms, splitting a $600.00 payday 9 ways is not the most attractive proposition.
Also, once (if) you find a section leader, you can rotate players in and out pretty easy. I know a dozen horn players (sax, bone, trumpet) and they would all gig with my band if they were free.