simple question, i have heard that it would take me around 24 hours, the bitcoin calculator says more than 100 days and so on, so i'd like a real answer.
About 166 days. You will create about 0.006 BTC per day.
You really though you could make ~$100 a day ($36,500 annually) with a single GPU which costs $300? If you could wouldn't you buy like a 1000 GPUs and make $36 million a year.