Daphnia should still breed in the winter - usually just need to knock off the ice from the bucket and there will be some.
BBS is good - but many breeders refuse to feed that exclusively as many have cases of bloat in their fry due from overfeeding of the BBS (which I believe is due more to over feeding of the BBS and the fry going crazy for it.
Banana worms are great for first foods.. micro worms (never heard of the ventral fin missing.. has it been stated as a fact?).. vinegar eels.. those are great foods for fry just after they lose their egg sack. After a few more days you can start on BBS mixed with other live foods/premade foods.
Keep in mind, it takes a lot of infusoria - I'd ask Oldfishlady, but I know when I started I have a 10g just for plants and was told 2 weeks growth in there would equal to about a days worth of food for approx 30 fry. So make sure to start your infusoria weeks prior to breeding to make sure you have plenty of food for them to eat.