The price you pay will depend on if your rural or urban. In most large urban population centers, for a licensed plumber you will pay about $65 - $95 00 per hour for a Journeyman Merit shop contractor, and $110 - $210 for a Union shop contractor. The amount of time to change it out will depend on if its cast iron or plastic. If its cast iron, you can expect the labor for the plumbing to take about 16 hours. If its plastic about 12 hrs of time. This includes the time to leave and come back after the carpenters to put in the fixutes. In addition to the carpentry work, you will need a flooring contractor. Many times small contracting firms have carpenters who will do the drywall and the flooring. If I had to guess on the price I would say its about $1200 rural and $2500 urban.