As said, it depends if you're paying someone or doing it yourself, even if you are paying someone prices can vary massively depending on how good of a job you want.
I bought a spray gun and did mine myself, I'm now in the process of painting my 4th one, albeit mine have been 90's but still the same principle.
A few people have asked me about paint when they have seen mine that's been done in a pokey little garage, and I always tell people the same, give it a bash.
It might seem daunting now, but it really isn't hard, most of the work is in the prep.
And those who do actually give it a go, have said it wasn't as hard as they thought it would be and have had good results.