How much can I expect to pay for plumbing to accommodate these changes?
The idea is to rotate the tub 90 degree around the drain point (which I am told might not be filled in and I might not need to open the floor again)
The other think that changes is the position of the sink as you can see in the second picture. It will be a single tap sink not a two tap as shown in the second picture
The room is 112"x78"
The main vent is located probably along the vertical between the toilet and the bat tub in the second picture
Note: I will do the demolition required myself, I would expect the plumber to do only plumbing work