Lucky enough to own a Dutch oven, but i still just make loaves in a tin, and put a tray of water in for steam. I'd recommend a cast iron dutch oven in general as it's my favourite pan and theoretically should last a lifetime. However as a Poor who only has one because I married a guy who already had one himself I can understand holding back.
Unless you're bored, want to experiment or just want to expand your range I would just stick to normie supermarket bread flour. Works just fine.
Saying that, I probably do plenty of things in a "wrong" or wasteful way. I just keep to a rhythm and system that works for me. I keep mine in the cupboard, feed it daily using 50:50 45ish grams each flour and whey (have whey as a by product from making yoghurt anyway) and bake one tin loaf that uses a lot of starter per week alongside a pizza base to keep things from getting out of hand. Any leftover loaf gets grated into breadcrumbs which usually freeze well due to being pretty dry by that point.
I can imagine in warmer climates, or to be more economical, wanting to fridge your starter. I just cba with having to put extra steps into baking and I have a v small fridge with limited real estate in there.
It might be boring, non-artisanal or not the most correct way of doing things but it fits nicely into the rhythm of the week around my other responsibilities. I like having real bread on hand and, much as i go through a lot of flour, the cost isn't one that I'm too worried about. It costs about the same between the nearest supermarkets to me. Slightly cheaper at Aldi but not enough to make a special trip and often one of the loyalty cards offer me discounts/bonus points seeing as they know i buy a lot of it.