Karen,
With the bellows and 80mm lens, the length of subject side ranges from 2.75" to 0.85" (approx.).
With the 55 tube + the 10 tube and 80mm lens, the length of subject side ranges from 2.75" to 2.3" (approx.).
With the 55 tube and 80mm lens, the length of subject side ranges from 3.2" to 2.75" (approx.).
With the 21 tube + the 10 tube and 80mm lens, the length of subject side ranges from 5.8" to 4.25" (approx.).
With the 21 tube and 80mm lens, the length of subject side ranges from 8.5" to 6" (approx.).
With the 10 tube and 80mm lens, the length of subject side ranges from 18" to 9" (approx.).
With the 80mm lens alone, the length of subject side ranges down to 19" (approx.).
The old 10 an 21 tubes can give an inexpensive (relatively) way of getting a subject of down to 7 inches to fill your composition singly, and combined can get you down to a subject of about 4.25". The 55 tube may used alone or with the 10 tube to get the kinds of images you mention in your post. The bellows sounds like overkill for these kinds of images, but you may get creative going smaller. I would recommend one tube to start and see what kinds of images you can create with it, and then go from there.
The numbers above are my approximations from the chart in the old Close-up Photography theme booklets published by Hasselblad in the '70s.
I hope this helps as a rough guide. The above are not distances, but subject size. Plus I mention just the older tubes, because they can be acquired for a lower price than the newer ones. One can extrapolate where the 8, 16, 32, and 56 fit in based on the above guidelines.
Taras