when looking between increasing one enterprise or having a new one, look at labour, machinery, use and how yards etc work. Not just in normal times but when foreseeable things happen.
I have seen lots of people who increased crop area only to find the combine needs to be new instead of a few years old, and the cost of a new machine makes the increase unprofitable. Often there are sizes that make sense and increases have to be in steps. Half a step is unprofitable.
Moral being you need to look at every thing, even get some one else to look at you whole plan.