It depends a lot on the quality of the paint and how many coats.
I have a 208 and can get two coats of paint out of a gallon with some left over.
Since you can buy bottom piant for 80 buck or 250 bucks, I can't give an estimate.
Figure about $5-15 a foot for labor to paint(just labor).
You need about 4 coats of barrier paint and at least two of bottom, so thats 6 coats at 20 at lets say 5 bucks a foot or ... 600 bucks to paint plus the paint , maybe another 300-400.
Blasting in my area starts at about 600 bucks for a small hull.
That adds up to 1500 or so. Assuming one person is doing the job, you may get a break. Figure $1100 at a minimum and perhaps $2000 at the high end.
A lot of the cost is labor and that is location dependent.