Bunnies are social. 2 or 3 is much better. ESPECIALLY if they're going to be outside which frankly isn't entirely the best option if there's any possibility they can be inside. Also, you're missing a lot on the diet. Those three are good and all, but bunnies aren't going to eat clover day in and day out because of the protein content(I think it's the protein content; I do this too, I pull fresh grass, clover, and dandelions from the yard as a daily basis, but that isn't all I give my bunny, and my bunny stopped eating clover when her body told her it had had enough of the protein in it). Also, you need to put serious consideration into neutering all bunnies, because they are NOT the cute, friendly, please-hold-me creatures they are portrayed to be. They can be anti-social and mean, especially if they aren't altered.