The best way to estimate a plumbing job is by asking the plumber how much everything will cost. Let them inspect your home and decide how much it will cost them to put in new fixtures. They should also add in the costs of parts and labor. Let them see what materials you plan to use or which materials they suggest will be the best for your home. Then, they will be able to add everything together and see how much it will cost and how long it should take them to do the work. If you can't afford the job, consider asking them for a payment plan or if they are willing to work with prices for you. If they do not offer payment plans, you can check offers for plumbing financing at Acorn Finance.