how to own a zoo?

[Bartman]

If lets say, not now, but later on in my life i wanted to own a zoo...it didnt have to be huge and it didnt have to have all types of animals but id like to own a zoo that helps endangered and just animals live...like a big breeding program to help save species...what would i have to think about or plan or anything to go about doing this. Would i have to get a grant or something from the government? Would they give you money or something...how does it all work.

thanks, any info is appreciated