Son, good on you for getting in great shape! It shows discipline and determination. As far as being a pro, if you were shorter, like 5'7" and shorter, then yes I can see you becoming pro.
But, at 5'10" youd have to step on stage at 275-280lbs just to be competitive. There are only a small number of tall (5' 10" and above) professional bodybuilders who do good (placing in the top 10 at the Mr.Olympia). One of them is Toney Freeman, Dennis Wolf, and um........I cant think of the rest.
Also, even with tons of gear and great genetics, it would be hard to fill your frame in order to be competitive. Again, most professional bodybuilders are tiny short men with small frames. Besides, why would you want to stunt your height by taking steroids? Remember son, GIRLS LIKE TALL GUYS! lol (now all the short guys are gonna bash me)
-C