Hair Extensions for Wedding day??

So my SIL and my friend (SIL's youngest sister) keep telling me that if I want my hair down for my wedding day.. that I should get extensions and if I plan to get a good set then it's around a good $200. I guess it makes me a bit insecure because I've seen women with medium short curled/wavy hair for their weddings (photos) and it looks great! But their telling me to get extensions.. I honestly don't mind my hair being the way it is.. it's length is a little past my back shoulder bones as of right now. I'm sure it'll be grown out some more by the time July comes around but.. I guess I wanna do the most reasonable and best thing. (For looks but also considering my budget) What do you all think I should do? I also should note that I know the extensions would be more for volume and not length lol. Even though I mention length a lot.