Thats not bad, I just bring in some of the yeast cake into my lab, streak it out on some YPD plates, pick a colony, grow up in liquid YPD and make glycerol freezedowns and keep them in a -80*C freezer. Whenever I need them, I start up a 5mL liquid culture in YPD, transfer that to 50mL after a day or two, then up to a 1L for overnight growth on a shaker at 30*C. Spin down the liter in a centrifuge, resuspend the pellet in about 50mL of the spent YPD, and dump that into my cooled wort...
trying to build up a library of yeast strains, I have brewed 3 batches, now have 3 yeast strains frozen down. Guy I work with has several he has isolated from bottles.
Then again, most people don't work in labs...