I don't want to become rich nor get a big profit. Just wondering if I could buy a few second-hand GPUs and setup them in order to get a decent income in mining. I don't want to mine BTC, I guess farms get everything so I was thinking about mining Monero.
I made a little research  and I know I need the GPUs, PCle x16 in order to install the GPUs and then the power source. What I couldn't find was information about how to make all of them work simultaneously.
So I was wondering if some of you have experience with this or could lend a hand by giving information sources about this.