If you are getting married, will you buy or rent your wedding dresses?

Now it’s homecoming time, and my sister is lack of money, so she decide to buy online, I like the 2nd one, but she prefer the 1st. However, I think the 2nd one is much nicer. What do you guys think? http://www.hotinshop.com/sexy-strapless-little-black-elastic-chiffon-home-gown-of-gold-sequined-detail-front-and-open-back-p-7830.html http://www.hotinshop.com/chic-aline-red-taffeta-strapless-sleeveless-short-homecoming-dress-p-5642.html

We are going to have a small wedding with only 5 people and i still want to wear a white wedding dress its not going to be fancy but is that ok?