What's this thread about? Seeking attention? I don't think its unfair your old dear asking you to pay your way, even if you think your not costing anything your still there using power, water, gas, utensils, making mess etc. My kids cost a bloody fortune, even if they think they don't and anyone with kids will tell you that.
If you have to move out then welcome to the real world, time to find a way to survive, get another job or 2 and stop waiting for life to be handed to you on a silver platter, get out there and make shit happen!