Expect your job to take a long time
Our job started off good. It was projected to last 5 weeks to two months. But somewhere along the way, the workers were assigned to other jobs and gave us only one day a week or less. At the start, the contractor and the plumber communicated with each other. That, too, broke down and I had to mediate between them. Then we realized that the finishing work was sloppy and done poorly. I had to watch very closely to get it all done. Oh, the project took a year to complete!