Jesus, you guys are quickly! haha
Well, gonna give more details:
To be fair I dont really wanna shot in studios, at first I'll shot people & pets at meetings, parks, etc....
As I said, one day I may need a studio or something, but for now I'll shot at public places or home.
I love animals, all of them, from insects to the big ones, specially dogs, so I may start and focus on common pets, like dogs, cats, etc... but, having in mind my limited budget, I cannot get a D610 + 3 or 4 lenses for get it all, for now, I can get a D610 + $500 lens, or, a D7100 + $1K lens(es).
I can live for a while with one lens, and I may be able to get other lenses in the end of the year, but for now, and for now I mean the next 4-6 months, $2k is my budget!
So, if I go for a FX, I'll get a 85mm lens at the begining, but I'll be able to get other lenses in the next 6 months, and if I go for DX I may be able to get kinda a kit with more lenses.
What a doubt, I'm almost going for D610!
Btw, thanks for your time!
When I mentioned flash, I didn't mean that you would be shooting in a studio. A portable flash unit with a diffuser could be more an advantage to you wherever you want to shoot people and animals. But this is only my opinion and maybe you know better. One thing I know is that the D7000 is a fine camera that is very capable of great pictures when handled properly and if you don't go over 3200 iso.