This sounds like a lot of fun. I do this all the time, and all the productions that I make use MIDI. I have about 3TB library of different sounds and instruments. Hmm.. latin percussion.. Check out
The Latin Rock Noir Piece in my portfolio to get a small idea of some of the sounds that I can get. It's a funny little piece that starts out as a jazzy noir thing, then goes into latin rock with a Santana like guitar
I'm bidding so low, because I'm new to Freelancer, and I'm more concerned with getting good feedback in my profile for right now.
Let me know if you have any questions.
Cheers,