I am sure you have found Carrie's (on here known as Lurkyloo) guidebook, website and podcasts in your search. That should give plenty options about what is possible.
I second the previous poster. Work from your character: what makes sense for their level of income. But also what do they like or not like? If you have a quiet homely couple, then an over the top 3 day wedding with all the bells and whistles does not make sense. And if you have an extremely extraverted couple with loads of friends and family, having a secluded beach wedding with 4 people is not making sense. You can book rides, characters, musicians, Cinderella's carriage, you can do all, or nothing.
Stories work best if the characters' decisions are logical. If you insist on writing a Disney wedding in your story, what kind of people want that? What has happened in the years/decades before that they want to get married at Disney? Motivations need to make sense.
And if you decide that the couple wants it all and going to book it all, who is going to pay? If one or both of the couple are born rich, that is going to change their entire backstory from if they were middle or lower class. What if only one of them is born rich, how does that influence their relationship?
If one or both have a well paying job, and pay for it themselves, then probably they worked hard to earn that success. Then they might be a little bit older, probanly dedicated to their study to get where they are in life.
When you know who your characters are, you know what kind of wedding will work for them.