Do I and will I have enough money to buy him/them food?

Your rabbit will need fresh vegetables and fruits, also some special products sold in supermarkets, petshops and veterinaries. They contain essential ingredients such as corn, wheat, peanut, sunflower seed, bean, pea, locust, barley etc. To help your rabbit to obtain enough fiber needed, you should feed him/her hay and fresh lawn.
Also she/he'll need to pay a visit to vet once in a while, to get her/his nails clipped or to get teeth filed. Maybe not as expensive as a dog, but these will still cost money.