In my opinion, rabbits (personality-wise) are more like dogs or cats then like a rodent (guinea pig, rat or other). They live for a long time (10 years + if properly cared for). At my rabbitry, if you want a pet, it will be at least $70.
Rabbit - $70+
Cage - $40+ indoor puppy pens are generally the cheapest, and can be used for house bunnies. You can also use baby gates for your house rabbit. Outdoor hutches, however, are generally priced over $100.
Food Dishes/Water Bottle - It'll be around $10 for both, if you buy them at a pet store.
Water Bottle Brush - You'll need to purchase a special water bottle brush for the bunnies' water bottles. Baby bottle brushes won't do that job correctly. At a pet store, it'll be around $5 for this brush.
Food - Shopping at a pet store or supermarket for rabbit food is always going to be the most expensive way. There, you might be able to get a 5lb bag of rabbit pellets for almost $10. At a feed store, you can get a 50lb bag for $20. However, the feed can get moldy quickly if you only have one or two rabbits. MONTHLY
Hay - Like with the pellets, a pet store is usually the most expensive way to shop. There, you'll spend around $20 for a 5lb bag of hay. At a feed store, you can get a whole bale for only a few dollars. However, it will get moldy quickly if you only have one or two bunnies. MONTHLY
Grooming Supplies - You can purchase a set of two brushes, chew toy and nail clippers at a pet store for around $5.
Litter - You don't need to purchase litter if you don't have a house rabbit. For outside rabbits, you can put newspaper or shavings at the bottom of the trays to soak up the urine. It'll be around $10 for a 5lb thing of litter, depending on what kind you get and where you get it. Some litter types can be much more expensive then others. MONTHLY
All these amounts are estimates. Depending on where you live or where you buy, each price can either be a lot cheaper or a lot more expensive.