I'll try to answer as much as I know.
I personally feed in the tank and haven't had any aggressive behavior yet.
all ball pythons are nocturnal some come out during the day some don't. I personally just have a heat light on 12hrs a day. As far as pricing goes, it all depends where you live at and the morph you want. I would suggest try searching online for some breeders to get your snake from, if you don't mind waiting for it to get shipped.
Yes it's a royal ball python.
and I completely understand about getting it while it's young.
Hoped I helped a little bit, I'm fairly new to this my self and still learning.
Karnage Royals
1.0 Yellow Belly
0.1 Bumble Bee
1.0 Het Albino
0.1 Het Pied