What area do you live in?
My husband is a licensed plumber and is certified for water lines, gas lines, inside and outside......if you email me details, I can maybe get him to help me help you walk through the process to get it done
He does sinks, toilets, etc in service calls so can run, add, fix, anything and will be happy to give you the info you need to do it.
[email protected]
Also, if any of this is run off gas fixtures (gas water heater, etc) then the owrk will have to be done by someone who is licensed and certified in order for it to be done and approved by the gas company. The gas compnay will not turn the gas on to the area until the lines are done by a certified person and all lines are tested.