How much can you earn with RX 580 8GB Mining?

[Molzz]

Could you please tell me how much one can earn daily with a regular computer case? The system includes an RX 580 8GB graphics card. This is the topic everyone is curious about. Leave internet values aside. I want information from friends who have personally tried it. Can you please help me with this?
Here is my system setup:

MSI H110M PRO-VD
G4560 Processor
8 GB RAM
Gigabyte RX 580 8GB
Is it possible to install 2 or 3 graphics cards in a system? Can I mine with the system I bought for gaming? What will be the earnings, how much electricity will be used, and how much profit will remain after deduction?
Thank you in advance for the information you will provide.