Since this is a valve issue you as the property owner need to replace this soon before it damages the ceiling of the unit downstairs and depending how deep the valves are sometimes it requires to break the walls to fully repair the valve pipes and then yes you will need to repair the wall after plumbing is completed.

You want the expert in their field not a generalist that is an inch deep and mile wide.3) Make some calls and check with other property owners in the area.  

First thing I think you need to do is take a few deep breaths and be thankful she is gone.

So the disconnect is deep and wide. 

I won't get too deep in the details but I had an appraisal done on the land with a proposed house on it and it came back pretty good.

I knew, deep down, that we were being screwed.

Sorry, I kind of went into it a little deep but understand that it's simply passion to become financially free and enjoy the time i have left on this planet.

To make a long story short; I bought a house and rented it out to my family but at a deep discount which means I have negative cash flow from it. 

After Irelands terrible recession we decided our best option was to save for a mortgage abroad, as we have friends and family that are in a deep struggle to get out of the rental market and into the house owners.I long story short, after initial problems with finding ideal work we are now up and running and saving more than we could have ever dreamed.

This requires a deep knowledge of execution, but is very rewarding and exciting.