Zeus is actually one of the few games I own (and Cricket 2004 and some really old games - I just dont play games that much).

Interesting Idea on the butterflies, what if you had to actually have someone 'planting' butterfly eggs

I like games that make you balance things - this is often one of the key things in a city building game. For example in Zeus house cant grow bigger than a certain size without a doctor walking past, but an infirmary (that makes doctors) lower the apeal of an area making house less likely to grow. The caterpillars do this sort of thing.

I would really like to get going on this game Now I just need to find some time

Keeping it as simple as this definitly makes it achievable. If we keep the more complex ideas (Fairy Castles etc) out of it we may make it work...