Looking to get some Motown/Soul/Funk songs mixed

I'm producing for an artist who is going for an ol school vibe. Think Motown like, James Browns 60s funk, Al Green soul. Wondering how comfortable you are with this sound and what would be the charge per song or the charge for all 6 or 7 songs. I've attached one song we've completed to get your thoughts on being able to work with it.

Additional info:
I'm interested in working with a very experienced mixer. The song has over 50 tracks recorded that need mixing. I'll need you to master it too if possible. Check out the song I attached. I represent an artist. I don't have a hard deadline for this. The tracks are cleaned, tuned, and and the song is ready to be mixed.