Baby on breast will save you time pumping, cleaning supplies, buying expensive supplies such as
bottles,
breast pump, sterilizer bags,
breast milk storage, dish detergent, cleaning racks, cleaning baskets, etc. (even though if you don't plan on using a pump, I still recommend a manual one just in case you need to leave your baby and a few bottles.) Whereas breast feeding from the breast gives you a special bond with your child. There is a lot of research out there about it.