A mining farm really require a lot of patience and work , I wouldn't suggest it unless you are passionate about mining and you are not seeking for profit only. With such a large amount , I would do some trading or simply buy and hodl bitcoin for long term. You can also invest in some ICO to x2/x3 your bitcoins but make sure you do your homework before that.
If you think you want to invest on a mining firm or a mining investment the first thing we need to consider is information for us to achieve it in the first place. We should learn the actually mining and the minimum requirements for us to mine Bitcoin using GPU or computer components with the help of the information given on the internet for us to start on.