If u have 2million to invest. Personally pig farming is what I will advice, from experience u will easily get the hang of it as in learning wise and your money will come back to you fast.
That been said all livestock enterprise is a go if u get the hang of it. But start with piggery I beg u. Let me give u a simple calculation if u buy weaners ur overhead cost one each one plus money to buy and feed won't be more than 30k/ pig/head and after say 5momths u should expect a profit of 15-20k depending on d price of pork/kg

I am an Animal Scientist a graduate of Animal Breeding and Genetics from the federal University of Agriculture Abeokuta. I graduated in 2013..... Am in Lagos and have extensive practical knowledge of Animal husbandry, micro livestock, Aquaculture, feed milling, ruminants and Apiculture. Am looking for an exciting opportunity where my skill sets will be exhibited. My contacts : 07038750232
Saheyishola@gmail.com

if u have not decided what to do yet, then I will advice u go into piggery, it has attributes that makes it profitable yet easy to manage, all you have to do is pick one piggery enterprise........... you will be glad you did

saheyishola@gmail.com