I checked out the spreadsheet mentioned above, but it isn't all that easy to use.
What I really need is some approximate guidelines. There is basically only one question:
Given enough time to stabilize things, how many people can one (XX) provide for?
That is with XX being a grain farm (with two fields), a veggy farm, cow farm, sheep farm, clay pit, olive grove etc. Food and basic goods are obviously the most important to get a grip on.
So, for example, if I plan out a city with 10 insula, 6 domus and 4 villas I'll have somewhat over 2000 pop if they are maxed out. I need to know what I need to build to provide for those, and also how many to start with if I have a starting pop of ca. 1000. You get the picture, I'm sure.
Edit: I just read above that goods are per house, not per person. So, that creates en extra question:
Given enough time to stabilize things, how many houses can one (YY) provide for?
With XX now being food and YY being raw materials for goods.
[This message has been edited by RobO (edited 10-28-2006 @ 03:28 PM).]