You will break even with this thing after around 5 months by mining the most profitable alt coins (currently $3.55 a day from mining Terracoin, the current coin on Multipool. This is a long term investment, but you can theoretically double what you payed in less than year. There is also the possibility of making much more if the value of the coin decides to increase substantially, but there is also a chance of it decreasing in value.