I can barely handle 100 tubers in storage with about 90 able to put in flats to test for sprouts in the spring. I ended up with 72 to plant out with 42 different cultivars. That is my limit on space indoors and out. Can't imagine keeping 200 straight.
You have a very orderly set up Frank. Somehow not surprised. I strive to be more orderly each year. I cut up old venetian blinds this year to use for markers and they worked well. Held the names even in sun. Will save them to put with the tubers for winter storage. Touch them up a bit if needed. I also save poppy seeds and use the same markers (venetian blinds) with a hole punched in one end to attach to the stems so I know what each seed pod is. Only have 6 or 7 different colors and all are just regular poppies not orientals. But they are all lavender to almost black and look nice with other flowers. But they get so tall I have to be careful where I put the seeds.