Can you pay invest costs with Colonial Market?
Colonial Market and Invest
A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Can you pay invest costs with Colonial Market?
Assuming you mean the second trait that produces 1 Gold, as opposed to the first that produces 3, no you can't, sorry.
Invest is not an "action".