dwarf seahorses are hippocampus zosterae. The adults are about the size of your thumbnail.
Yes, if you have an appropriate setup without anything dangerous to the tiny dwarf fry, you can raise the dwarf fry up with the parents in the same setup, however, really the fry are no more easy to raise than benthic erectus (southern), it is just that the dwarf parents are as difficult to maintain as benthic fry... so the dwarf fry seem easy in comparison.
The adult dwarf is difficult to maintain for a couple of reasons. It is difficult to keep the water parameters safe for them, and to keep the temperatures low, because they require such small aquariums in order to maintain an adequite feeding density. They also require very low flow, so as not to get blown around and injured, and so they can catch their food. Traditional clean-up crews cannot be kept with them, because they either pose a danger to the dwarf seahorses, or will be killed by panacur treatments to rid the display of hydroids. And, hydroids can kill dwarf seahorses, and will most certainly show up in the aquarium with all the bbs being fed. The biggest issue for dwarves though, is the daily hatching of baby brine shrimp, as baby brine shrimp is the dwarf seahorse's main diet. However, since your intent is only to breed, you'll be hatching out baby brine shrimp anyway, so keeping dwarves would be like having seahorse fry every day of the year.
You still haven't said why your only intent is to breed the horses. Like pledosophy said, if its for the money, you've picked the wrong fish. Also, if it is to sell the seahorses, know that dwarves have very small broods, and with the larger seahorses who have more fry, even the best breeders only have a small percentage of the fry survive to juvenile stage, and sometimes none at all.