It doesn't surprise me that you can't sustain more than 10 villagers on a "no fishing hard village." Even on the normal difficulty setting, the farm can't support more than about 12-15 villagers, and the hard setting is...well...
hard!
I think the main difficulty that you're having is that the GC doesn't just appear in VV1, unlike they way it worked in Village Sim. It's been so long since you last played that you may have forgotten that you have to
do something to get the GC in VV1.

To keep from turning this into a spoiler thread, I'll simply recommend that you consult the Guide Section at the bottom of the forum for help if you've forgotten exactly what you need to do.
