Is it really possible for my attorney to get my warrant dropped at his office that day like he said?

I have never ever been in trouble, not even a speeding ticket. I went to the magistrate and I pled guilty and so they sent up my prelim. I accidentally missed my prelim so they put a bench warrant out for my arrest. My charge is for a wash from rent a center I didn't make payments. I called a lawyer and he told me not to turn myself in but I am not on the run. I will be going to his office in the morning instead of the jail. He said he promises he will get my warrant dropped and figure out what kind of punishment I will get. Should I waste $1500 or is it worth it?