postgraduate studies

After graduating as a pharmaceutical chemist I would like to do some economics course or something similar to that, the reason for choosing economics is simple, I would like to try to set up my own pharmacy, so I would need knowledge about economics so as not to fail in the attempt, maybe business administration would be a good option. About where I would like to study it, the truth, I am not sure, I have not informed myself much about the subject, but I think I would choose to do it in Chile, because it would be much more comfortable than leaving the country, in fact, if there was the possibility of doing it online or part-time, to work while studying, it would be much better.
Another option that I see valid, apart from economics, is to study human resources administrator, this more than anything if I changed my mind about my own pharmacy, since if I decide to practice as a pharmaceutical chemist I would work almost certainly as head of some section in some industry or something similar, because pharmaceutical chemist tend to be leaders in the work groups. I believe that both are good options to develop them in the future to become a more complete professional, either in knowledge or as a better co-worker.