Rear a Wild Animal
To rear an animal means to raise a wild creature from infancy so that it becomes domesticated. A handler can rear as many as three creatures of the same kind at once. A successfully domesticated animal can be taught tricks at the same time it’s being raised, or it can be taught as a domesticated animal later.
While the rule is there as a basis this is going to have to be adjudicated by your DM.
That said, we might be able to do some digging for some sort of groundwork base price and rearing time.
Please take note that none of this is RAW. Nowhere in the book is this mentioned or ruled for. This is my assumptions based on other parts of the books.
The "Handle Animal" skill mentions a DC of 15+HD of the animal you are attempting to rear. I'm not sure if this relies on the hitdie of a fully grown adult or if it's just 16 for a young one.
It would make sense to me that the DC would start at 16 and for every hit die it gains under your care the DC to continue rearing it would increase by one.
As far as cost goes, under the Griffon in the bestiary it says the following:
Despite the inherent danger, trade in captured griffons and stolen eggs is brisk, with their eggs worth up to 3,500 gp apiece and live young twice that.
Mind you griffons are VALUABLE and hard to tame so we can't use them as an example for selling past that but we can assume that live young of a marketable species would be twice the value of an egg of that same species.
The best way forward after that would most likely be working out a system based on the number and type of hit die of the creature in question with the 'young' template.
I'll post again when I do more research into this, but this question intrigues me and I hope I've helped.