For more of the miners the only problem is high cost electricity so if you will have a cheap electricity or you will be able to manage for solar panel (free electricity) then yes it is worth and you will earn some good profit with mining. But stay away from cloud mining.
Please you can let me know about the cost for building the solar panel, right? i never think if the building a solar panel is so cheap in this time and i never believe with that in this time. because for building the solar panel is so taking a much of amount in this time. you're so correct if we are be able for get a free energy with that but we are need for considering or calculating with the capital for building the solar panel.