Assuming you’re really gonna do this, I have a few suggestions for ya. Food tours are a typical part of my vacations, and I’ve been to plenty in multiple countries.
—don’t make the tours too long. Ppl have incredibly short attention spans these days. Add in a few kids, some ADD adults, etc and you’re talking ppl who can’t sit still or pay attention. Think about interactive activities, not just you talking, for the travel segments between the poboy stops.
—music can be a fun addition to this sort of tour. Have a poboy or neighborhood related song to kick off each segment of the tour...a piece of music by someone who lived nearby or mentions a food you’ll be sampling, for example.
—pick your departure/drop off point carefully. Ppl will arrive early, and NO is hot and wet. Ppl don’t want to be standing in 90 degree heat or in the rain waiting for the bus to arrive. If a bar is your pickup spot, make sure kids can enter.
—for $50, Americans on the tour are gonna be expecting quite a bit of food. Have the food prearranged for your timetable/arrival, and think about whether you will eat on the bus or in the restaurant. Most shops won’t tolerate you showing up week after week with 30 ppl in a herd who take up seats and don’t buy whole meals. You can’t treat sit down spots as “fair game” for your group to linger while snacking unless you arrange w management. Expect to be charged a fee or to be asked to spend a minimum amount if your group lingers for a while.
—maybe forget the bus aspect and focus on small group/private tours with this team. Bus adds a layer of complexity that you don’t appear to be prepared for at this point.

High end hotel concierges will steer excellent business your way if you cultivate them. But be aware that they’re used to getting free stuff or compensation in exchange for the referrals.