Ok get a coati, they can be great animals.
They should have a huge outdoor zoo quality enclosure, and need a lot of intellectual enrichment. Don't believe everything you are told about them, especially if the person giving information is a breeder/seller.
I don;t think they are specifically bad animals (no animals are bad), but I have worked with at least 4 different individuals. Granted, I was administering vaccinations (they should be vaccinated against rabies and distemper), sedatives, anesthetics, and assisting with surgeries. These are probably the times when you are most at risk, but these are also times when you will have to be able to capture and fully restrain your animal before brining him/her to get medical attention.
One of the coatis that I treated was very affectionate and friendly, but I wouldn't be able to force him to do anything by myself.
They are very smart and very willfull.
I definitely would suggest that you research how they are kept in zoos and then try to replicate the best qualities of those enclosures.
I don't think that coatis are impossible to keep responsibly, but that's probably how my post sounded,

sorry.
Be warned---coati mundis are not domestic pets! They have not been bred for long enough to produce a house pet.
Be perpared for the worst to happen and hopefully it never will.
Good luck
Sorry if I came off like a jerk.