Now that we have a venue to inform the feel of the wedding, it's time for invites! Print-at-home is your friend. Failing that (or in preference to that, if you want to print on thicker card, or want the colours to look really lush) you take your stuff to a printing centre like KwikCopy. To be honest, I can only make an educated guess about the cost of printing colour papergoods at a print centre, but I am guessing you'd be looking at a couple of hundred dollars to do your invites plus a little more (rsvps, menus or thankyou cards, maybe?).
And etsy is so very much the place to look for your invitations. There are loads of simply stunning options for pdf-downloads to print at home. I think this would be perfect for the retro town hall dance wedding:
And maybe this one for the casual-elegant Italian do?
If either of these are busting the budget, I even found this lovely monogrammed, flourished printable set for $15!