Last year I had a bit of spare cash burning a hole in my pocket, so instead of a second exotic spousal trip we decided to do a little work on ye olde homestead (it is, indeed, an old farmhouse, 1820) to enjoy as we begin to experience a touch of grey.
Not a large project, but everything is complex in an old rambling firetrap of a place. You have to make some steps. We combined two small bedrooms into one gracious one, and added 14' to the upstairs (while expanding the kitchen workspace downstairs) for a walk-in closet and space to put an upstairs washer and drier.
Not a big deal, really, but why we put off putting that washer and drier upstairs for all of these years seems crazy to me. Sure could have used it when the kids were little. It feels sinfully luxurious but I think I earned it. GE machines, ok but maybe not the best.
The plumbing was a little complex, of course. Plaster walls.