Heater for 5k$ ?? (miners)

My adventure with cryptocurrencies began in January. But first I would like to write something more about my miners. With two guys we bought 2 miners 6x GTX 1060 6GB for about 15k pln per once( 5k$).
The computer is quiet but gives a bit of heat, Can be used as a heater, ideal for winter ;)
First, we bought computers with RX570 graphical gaming, we waited for almost 3 months because there were no cards on the market. The seller offered to pay more and build a computer with better cards Nvidia 1060 GTX 6GB, we agreed and finally we have them. After 4 months of work, they work very well without any problems. During the first month we mined Ethereum classic, later classic and now BitcoinZ. The results from December are impressive.
This month, we managed to earn about 70% of the computer's value. Two more months and miners will generate clean profit. Mining is not for everyone but for someone who is interested in it is very good and profitable.