How do you get a sponsorship to play professional golf?

legalbgl is right I don't want to sound harsh but sponsors won't care if your playing off 5. There are plenty of scratch golfers out there. And no I am not a scratch golfer, I am off 14.5 but I am in the same boat as you. I have time and the passion to want to make money from golf. I have a long way but every ones got to have a goal right? Find time to play and then if you can consistently shoot around par then enter as many scratch competitions and any other open competitions as you can. Get some experience and then start thinking about going to Q-school or something. But for now keep playing and enter competitions, then write back with a question for your next step. Good Luck!!!

if your a 5 hc you dont have a snowballs chance in hell

Seriously, why would a company sponsor you? You need to be able to make them money. Your not a name, and you do not have the ability to get exemptions on any real tour. Not trying to be rude, just giving you the facts. What I would suggest is you have a fundraiser in your community to raise money for your entry into Q school. If you make it out of q school you can play on the nationwide tour and start making money. On the nationwide tour you will be picked up by a corporate sponsor if your good enough. The rest is up to you.