If you want to do this I would suggest looking into it once you have a job, there are reoccurring costs and a few start up costs to go along with it. If you want to have more animals, you better have the fiances to do this for free. Most of us do not make money. Never ever plan on making money, it's like putting all that money on "4" and expecting something in return.
Sure there are some people who do very well, as for the rest of us.... it's just fun playing.