I'm really curious why you are asking this.
You're 27. Unless you are from a cultural background where it's the norm to live at home until you get married, then you are well and ripe into the age where it's normal to live on your own.
You don't seem to actually be asking when is the appropriate age to move out, you seem to be asking if it makes sense in your personal, unique situation to move out.
Well, none of us can answer that for you.
Obviously, if you are getting free rent from your parents, despite being an employee adult, then that set-up is financially superior. No question.
Whether the trade offs for you are worth it is another matter and entirely up to you.
My knee jerk reaction is get out and start living your independent life, but that's me, that's my bias as someone who does not come from a family culture where adult kids living with their parents is normal. None of stayed past 18, so in my family it would be weird, someone would have to be messed up to do that.
However, I also briefly lived with another family from a different background where they've never not had one of their adult daughters living with them. So for them it would be really messed up for an adult child to move out unless they were financially totally stable and ready to buy a home.
Different strokes for different folks. None of us can tell you what the right thing for you is.
However, from my point of view, if you are craving independence, then GTFO and suck up the fact that it's expensive because that's just part of being an adult. Stay put if you *want to*, but don't continue to be subsidized by your parents if it's not what you actually want for yourself.