How many Bottles??

Re

Hello! I’m trying to figure out how many bottles I need/will use in a day. I’m a sahw so cleaning them each day isn’t an issue. I’m currently registered for 9 8oz bottles but I’m not sure if that’ll be enough or If it’s a good amount to start with. Also I plan on getting the boon lawn thing, but I’m not sure if I should get one or two, Any advice??