i agree with Heather. There is NO WAY a bunny should go without fresh veggies 2 or 3 times a day. Pellets are bad for their digestive system and should be avoided or kept to 2-3 Tablespoons per 5 lbs of bunny. They need unlimited timothy hay.
If you can't devote the time to them I would say you should not get them. I work at a bunny sanctuary and while I want to say, take them, give them a good and loving home, if you don't have the time to play with them and feed them, don't do it.
Bunnies are charming and delightful companions. The more they interact with a human caregiver the cuter, more affectionate, and more comedic they become. They are definitely more work than a cat.