What is the price of electricity in Panama? You should build your own rack of miners. In Canada, where our electricity is quite expensive, I saw a return on investment in under 6 months.
Currently mining about $500/mo of ZEC or ETH after expenses. (Approx $3K to build the miner)
It is cheap here outside of the city but the heat created would make it difficult. Wow, you are killing it! I am not even getting that in a whole year.
That's one of the benefits of being in Canada (Iceland is better). For 8 months of the year, the heat generated from the miners is actually subsidizing the heating costs of the house. :-)
For 4 months, the Air Conditioner has to work a little harder to keep the temp of the miners and the house under control.