VP:
I've been to Vegas a few times. It seems that you could advertise yourself as a convention photographer in the Yellow Pages. You could market yourself to organizations scheduled to convene there. Most convention centers have a calendar of upcoming events and a list of general contacts. You might want to look into something like that.
I know that Vegas is a union town. I wonder if there's some sort of union you'd have to join to go pro. Hmmmm...
Yes, I have and plan on doing that (conventions) but I have a few loose ends to tie up first. Insurance coverage, Onsite printing and not over extending myself. My day Job is and will be my primary source of income for the next 17 years. Unless Photography takes me over the $60,000 + K range overnite.
I work and deal with other full time pros here weekly and the market has its ups and downs. As far as I know there is no Photographers union only stage hands for the shows.
im high maintenance and would love to lead a lavish lifestyle ...lol. Now if I could only produce work to justify 10K 

