I recently did two bathroom remodels. I thought about contracting it myself but know someone that does that sort of work. He probably saved me $thousands and got me top quality work. I also saved by going to the local plumbing supply for better price and quality than the big orange or blue stores.
He has 25 years of doing this so by now knows who to call. I would have spend many hours just trying to find out the best tile guy, plumber, etc. I know enough to avoid the big ads in the Yellow Pages.
Oh, paying cash helps too.