And never in a billion years would I stuff a paper wedding invitation into a regular business envelope and scrawl a name and address onto it...
Come on! It's your wedding, people! The fact that this invitation has "six o'clock in the evening" spelled out tells me they were trying to be a little bit formal about it, but with the text message thing it sends a mixed message.
And then can we go back to the envelope for a minute? The guests' last name was just scrawled on it. Not Mr. & Mrs. Jones, but Jones. Not The Jones Family, but Jones. Is it a shotgun wedding? Is it an arranged marriage? Where's the joy and celebration...? I don't know about you, but I've gotten mail addressed to Occupant that seemed a little more cheerful than that. oy.
Do it all on paper or do it all online... just do it consistently. And try to show just s smidge of enthusiasm, mKay?