I'm not sure if this is a bug or by design, but I've capped out my storage in Velia by purchasing slots and now I can't purchase a crop factory or anything that requires renting additional storage.  

I am going to check to be sure, but I'm going to say its intended. Similar senario happens when you try and sell to the Imperial Trade option, if your inventory is full it won't let you sell, and you just have to move the item to free up a single space.