You mentioned 50 ASIC miners, I'm guessing you're refering to Antminers s9's because they would be more profitable.

You also mentioned that you have the electrical covered by one of your colleagues so thats not a problem.

My recommendations is managing the temperature, moisture and airflow.  Do some research on how data centers manage these parameters. 

Once you've mastered that, you'll be fine.

Its one thing to manage 5 to 10 asic miners, but 50? You'd definitely have to go data center style.

I'm from a tropical country as well - St. Lucia in the Caribbean. I currently have three asic miners and plan on increasing those numbers over the next couple of months, and thats exactly how i plan to. I am also going to be incorporating Solar energy as well.