My mom brought this up to me last night, maybe it would be better to rent a wedding dress rather than buy.
But I don't think you can do alteration of a wedding rental. Most of the wedding dresses I've browsed online, they are all tall models and I'm 5"2' and a quarter. I understand wanting to save money but there's no way I am walking down the aisle where there is a strong possibility I could trip over my own wedding dress because it's too damn tall for me, either!
Can you still do alterations on a wedding dress rental?