Hi, we have a galley style kitchen and are interested in moving it to an addition that is now used as a very large dining room.I included a pic, excuse the Christmas mess, I took it and cringed. Lol the sink is where the cat it and the water heater is behind the wall to the right of the cat. The new location for sink and dish washer will be by the ugly green blinds. Both walls are out side walls house is on slab. Can I run drain with out drilling into slab? Can in run hot and cold water in wall? Will I need new vent? Any idea in cost for plumber.