Fledgling beekeeper here. I'm going with 10 frame mediums and I'm thinking about making up some "nucs" like this: http://parkerfarms.biz/Images/10framenuc2.JPG out of regular 10-frame medium hive boxes. Then, simply building the hive up from there and using a simple piece of plywood on top for a top entrance.

Advantages:
- Bottom boards are just plywood
- Top boards are just plywood
- Nucs are just one-level hives
- Hives are just multi-level nucs

Disadvantages:
- ?

Obviously I know nothing at this point. What am I missing?