Could i be pro golfer?

sorry my english is not that good but im try ,hi im 30yr old , i start play golf 3year ago , now sometime i score 71 , 69 ,70 per 18 hole, i learned golf relay fast in 3 year, my best score is -4 in 18hole , should i give it try at nationwide tour , does anybody now how much it cost. i dont have alot money , i mean at my age will i make it.