At the risk of appearing rude (which is not my intention) I have to say that your many and various posts will only be properly answered if you get a plumber in to give you advice and a fully specified quotation for the works you want doing. It is quite clear (no offence) that you have little or no knowledge about how to go about your project and answers to all these several, apparently disjointed, questons will only serve to confuse - particularly f you chose to cherry pick the answers.
When you have done that get two more in to give you three quotes for comparison.
You can then decide whether to accept one or none of them but you'll have a much better idea.
PS I'm not going to bother replying to the double post.
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