I'd recommend reading up a lot on breeding before even considering it.
If you don't know how old the rabbits should be or how often, its better to just keep them as pets, and don't breed unless you know just how to care for the female during pregnancy and the kits during nursing.
But for the record the female should be 6 months, preferably 8 before her first litter, not older than 1-1.5 and in good shape (overweight rabbits shouldn't be bred from. Also don't overfeed them during pregnancy, in fact you don't need to feed much more than normal at all, though its recommended to change to a more nutritious food brand. Some companies have special food for baby bunnies, this is also recommended for pregnant and nursing does.)
The babies should be at least 8 weeks old before rehoming, and separated by sex before they are 10 weeks old to prevent inbreeding. (Also rabbits do not care if they are too young to breed. Letting a 3-4 month old doe get pregnant is like letting an 11 year old human have a child).
Not to mention rehoming. Dwarf rabbits like lionheads get an average of 5-6 babies per litter, but larger litters aren't impossible.
Can you find homes for all these? Keep in mind that even people who say they will buy from you before the kits are born may change their minds before they are of weaning age.
IF this happens, do you have room for housing them?
First of they need to be separated by sex, also if left unneutered the males are unlikely to get along past 4 months or so. The females may also fight as they get older.
I've had two litters of bunnies, the first time I got 12 kits... 8 of which died of undernourishment within 2 weeks because the mother couldn't handle that many
But you'd think the last 4 would be easy to rehome right?
Wrong. I sold two, who were already reserved, and planned to keep one. The last one stayed with me till he was 7 months old! If the others had lived I would have been stuck with 9 "unwanted" rabbits. But I kept him alright, and was determined to keep him for the rest of his life if no one else would have him.
Now I have 6 kits, still not of weaning age.
They're charming alright but they eat a lot and I still only have 2 reservations and one "maybe" so it still remains to be seen how many I'll have once they can be delivered.