I only recently got out of my dark days, and have been planning a Home One MOC for while now. However, a ship based MOC is most often massive, and therefore expensive, both in time and monies. I think that is a problem with most Star Wars MOCs, they are either based on battles or on ships, and therefore are pretty massive by design.
I think that is holding many people back, and explains why there are more mocs for other themes. It is fun to make a small archery target for the castle theme, but for Star Wars?