Back in the day, I did a lot of bank fishing. In my case, it was seldom an "open water" deal. Walking across fields with chest high weeds, overgrown banks, where you had to stomp out an area where you could get a cast in were common. For me, bait casters were not a real option because the chances of catching something on the back cast and getting a back lash were real high for me. With spinning gear I could do a pitch or a roll cast and keep the bait and rod tip in front of me - more or less out of the way.
Here is what I'd get, if I had it to do over with a reasonable amount of funding. Two 7 or 7.5 foot spinning rods, one MH and the other M. MH for jigs & worms, M for all reaction baits. I'd recommend the Fenwick AETOS, just because that's my current favorite line of rods. Get the same reel for both of them, If you buy a reel with spare spools included that gives you four line choices. I'd recommend Shimano reels - just because that's all I use. Back in the day, I had a Garcia-Mitchell 300. That was back in the days when Shimano was more well known for bicycle parts than fishing gear. I don't know where you live, but for me, braid with fluorocarbon leader would be at least two of those choices. You're going to be walking through vegetation so make sure you get rod socks ( that fit) for each rod. Get a medium sized back pack to carry whatever gear you need.
Buy stuff that you don't mind getting dirty. I found back in the day that bringing along a machete was worth the weight. I didn't always need it but it came in handy when I did.
I've always thought that the most important piece of equipment were my hip waders. These allow you to get off the bank a little bit and cast parallel to the bank easier.
Lastly, have an ultra safe spot for your car keys. You don't want to be out fishing, slip and fall a few times and then get back to your vehicle and ask the question "Where are my keys?" For me, one of those magnetic boxes that you hid somewhere on your car was the answer. Make up your own mind on that one. In my days of bank fishing, no one had a cell phone. These days, I have a waterproof case for mine. I get that getting all this stuff at once probably isn't doable funding wise, but if you get one piece every few months it is. Start with the hip waders and make sure that you get one that fits with a couple pairs of heavy padded socks. Walking any distance in hip waders without decent foot protection ( like a couple pairs of heavy duty socks) will cause some serious foot blisters and that ain't good.
One more thing, I lived in the midwest, specifically Boone County , Missouri when I was a meat fishing bush hippie bank fisherman. If I lived where gators or mega snake populations were any kind of an issue at all, I'd rethink the whole bank fishing experience. I'd make a serious effort to get to know guys who had boats who didn't mind me tagging along.