Mechanic

This a long shot. But I'm dirt poor and my car is my lively hood. And its running poorly due to a clogged catylic converter and maybe faulty sensors. Im trying to price around and everywhere wants 2-3k. Any mechanics in town that can do it for cheaper? Its not the whole catalytic converter that needs replacing just the manifold. I think thats what its called. Im just a YouTube mechanic way over their head.