Operation costs should be irrelevent to a true colony, as it needs to
able to at least produce as much as it consumes. Once it's fully
functional and operational it should be more than self-sufficient.

Uh - Colonies usually begin by shipping raw materials - lumber, beaver
pelts, etc. back to the home country in return for manufactured items
that they aren't set up yet to produce themselves. They do not start
out by producing as much as they consume, they start out bascially
shovelling coal back home.