wedding officiant?

So, neither Andrew nor I are of the extremely religious sort. Having a Church wedding has never come up, and on our list of expenses, minister is at the bottom. We will take what we can get. I just read online (haven't looked into it yet) that someone can get ordained as a minister in Texas for $29.99. That's it. I need to think of a person who would be appropriate to marry us and just go with it... it's so much cheaper! But, is it tacky? Thoughts? I also found supercute, cheap centerpiece ideas here. Love it! We still are no closer to picking a venue... BUT, we may be able to agree on a color. I got a flyer for a highly-recommended baker that had a Beatles LOVE Cirque du Soleil themed wedding cake. While it is cool, I don't really want it. But, Andrew does. We have seen the show three times and we love it, but nothing else in our wedding would work with it. He said that if he can have that cake, purple can be our main wedding color. I just have to decide if it's a fair compromise!