Anyone with a pet rabbit know how expensive it is to take care of one? I have an opportun...

I don't know much but I do know it is usually a lot cheaper to adopt them from a breeder or something than a pet store.

I don't buy pets from breeders or pet stores ~ my family has only ever adopted from rescues or taken in homeless animals off the streets :0 I'm more curious about like the cost of food and other stuff per month!! (๑❛ᴗ❛๑)

You'll be completely fine! This is coming from someone who had THREE wild rabbits at once, while living in an apartment with a small attached backyard. You can easily feed them, since they are vegetarians and will eat grass or hay. Their pooping is very mess-free since they are compact dry pellets, but you will need train it like a dog and take it out for a walk so it won't pee and poop everywhere in the house. You will need a harness leash for this, so they won't hop off. We had house cages that we put them in when we went to sleep, since they weren't potty-trained. The cages served as a "litter pen" for them to use during the night. Then , we would empty them out in the morning. All in all, they are pets that you can treat a lot like dogs and cats (have a litter pen in the house, potty-train, take for daily walks, play with, etc.), but they are WAY more inexpensive since you don't have to buy special food (the rabbit food pellets are not necessary).
And just for credibility, here's a link for more info: https://www.rspca.org.uk/adviceandwelfare/pets/rabbits/diet

I forgot to mention that you can take them to a grassy area/field and remove the harness, letting them roam free grazing on the grass. They don't hop that fast (unless you have a jack rabbit, like I had), so you'll be able to catch it when it has grazed enough.

It depends on your environment I would say. For example, it's fairly warm where I live and we often let our bunny roams in a small area of our backyard and it eats grass thrown in with a few carrots. We take him inside the house at night and you can potty train your bunny so that it's easier to clean up messes. As far as I know, monthly expenses aren't a problem. If you're going to buy rabbit food, then I suggested searching up feeding amount just in case of overfeeding.

Thank you so much for your informative response!! I'll definitely check out the link you provided too. :D

Thanks for the reply!! I'll do a lot more independent research like you suggested~ I wanna give the bunny a good home ^^

but keep in your mind when your little friend catch something and you have to go to the vet.... vet are or can be very expensive. and also rabbits dont like to be alone... I mean if you have enough time to play with your friend it's ok but when the rabbit often is alone its not good.