I agree on the benefits of quarter turn valves, but prefer to have a threaded copper male adaptor at the end of the copper stub coming out of the wall for ease of changing them.

They open up a wall."

perhaps it's too late or too difficult, but the wall to the right of the door has very little in the way of windows.  

Simply throwing together four walls and calling it a banquet space won't cut it.

The plan was to BRRRR.Renovation Cosmetic onlyRefinished floors, all new kitchen appliances, new laundry machines, added dishwasher.Improved layout - Added a small wall to create a hallway on the first floor.

A 21 inch cabinet instead of a 12 inch wall.

Long after the contractor is paid and gone I always find disappointing stuff like poorly done trim or out of square walls. 

The main floor did not need any permits since no walls were added, and everything was cosmetic, but the basement has new walls, electrical, and the bathroom was existing but moved to another location.

.- Know which light fixtures you want and where you want them- Know what color you want to paint the walls, ceiling, and trim of the interior- know which color you want to paint the exterior walls and trim- you should know what you want for fine detail items such as the mantel of a fireplace.In order to help you select these items, I recommend looking at houses near yours that sold quickly such as having gone "contingent" within the first week of listing and copy these finishes.

I do cabinets, doors, and porches with this brand of paint as well and sometimes walls or trim.