I am paying $15 per foot in Annapolis for a prayed on racing quality finish. There is a fair amount of hand work but I can''t buy the materials and pay hauling and blocking for much less than that so I''ve gotten lazy. The finish on my boat is more expensive because it is sprayed, and rubbed out. When you spray a finish there is less tollerance for small defects.Also the work being done in Annapolis,which is more expensive than the Carolinas but I may be getting some breaks because I am a regular at the yard and because the bottom started off with a well adhered and smooth finish to begin with. I really am not sure how much less it would be where you are but it should be at least a little less.
If you boat has never lived in the water and never had bottom paint, I would probably use Interlux''s barrier coat as a primer sealer and then go over that with any good quality