I know, that's kind of an stupid and recurrent question.
I am practicing one hour and half a day, some day less, because I expend time in other things like harmony, jazz,..., but I feel I have to spend more time just in the flamenco thing to be almost and acceptable player.
What do you think?
I am not saying, if you spend twenty minutes a day, each day you can be better, I don't mean better, I mean a good flamenco player.

I personally play something every day for as little as 30 mins or as much as 2 hours... but I don't necessarily practice in a focused way every single time.