I too wash my yeast, not sure if you saw the sticky on here or if you are referring to a different method.
In either case, it saves a ton of money. I have used washed yeast that was 1 year old with great results. There is a sticky up about how to do it but I have since simplified the method. I have mason jars that are half full of straight slurry and a chart on how much gram weight to use. Basically I pour off eh distilled water on top, spoon out the yeast, then put distilled water back on top and cap.
With my method there is no need for starters unless you are building up yeast from a new vial. You just scoop it out on brew day into a fermentor and let it come to room temp.
My problem is that I like or appreciate pretty much any style of beer, so I always need a varying yeast selection since I use pretty much all liquid strains. There is always one I don't have