Sorry, i didn’t realize this was a gown for your wedding!!! Firstly Mazel Tov, I didn’t read anywhere here that you’re engaged (Though seen plenty oon dating from you!) If you’re the Kallah, definitely DONT wear a shell!!! I thought for a sister or friend.
You may be saving money, but you’re also taking a risk that it won’t work out, that would be a waste of money too. Whatever you choose to go with good luck! and mazel tov again, enjoy!