ok, you don;t have to buy organic....i only buy organic carrots, potatos, bananas and the odd other thing from Lidl
the expense - well, at the start, you are giving a bit of this and that, so you are not cooking a seperate meal, some chunks of apple, peach or pear, or some steamed sticks of carrot , courgette or some roasted sweet potato, or boiled broccoli or cauliflower is not going to radically increase your shopping budget.
or fingers of toast , cheese, hummous etc...
you have to accept some wastage, but that is the same if you give puree, jars or BLW