Silo is great for modeling , but when it comes to sculpting, ZBrush is works way better for me and I get results much more quickly. By the way, It's probably me, but I've never been able to get a good displacement map out of Silo, but that's not  the point here, not at this stage. I could use Sculptris at this point as well. 

I do plan to redo most of the major folds in Silo, but I want to have an idea how it looks first. Sketching this out in ZBrush or in Sculptis gives me a plan how to continue.  I can do a couple of versions to find one that I like in very little time, and do that before I change the topology of my main model. 

The final version will have displacement just for the fine details.

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.