I'll do mining on monero, 3 personal computer with i3 on our office with free electricity. I want to make my own rig but gpu in our country is too high and I only working here so bad idea to set-up my own rig. I got 120 H/s on 3 core i3, it's not bad.
It not the time to build GPU rig in any country
But make some hash on free CPU and electricity is a good idea