Okay, my background is as a very large scale parrot breeder. My family raised parrots for thirty years. I have bred and hand fed Macaws, Cockatoos, Amazons, Conures, and many smaller species (literally in the thousands over the years).
If you purchase hatching eggs from any parrot species, you might as well just burn your money. First, I doubt you will be able to find any to begin with. If you can, the person selling them is a scammer, period. I would venture a guess that 99.9999999999% of parrot breeders will tell you what I just did. Hatching parrot eggs is not even in the same planet as hatching poultry eggs.
Handfeeding baby parrots is also not even on the same planet as raising baby poultry. Different species of parrots have *highly* variable levels of difficulty in hand rearing. Comparatively speaking, handfeeding a week old baby cockatiel is much, MUCH easier than say a baby Macaw/Cockatoo/etc.... The age also makes a HUGE difference. A baby that is even two days old is *much* easier to raise then one that is newly hatched. One that is a week old is about a hundred times easier than one that is a day old. When you artificially incubate them, you do not have the benefit of those early days of development being taken care of.
Finally, a parrot of ANY age can bond with you just fine! You do not need to handfeed them for this to happen and that is actually a VERY common misconception of people that have not done their research into parrots as pets. Hand feeding them yourself does not make them ANY more likely to bond with you.