While none of the 'advice' given above is wrong, one often finds one's self in a situation where a loan is necessary. In order to get married 5 years ago we both took out revolving loans (of almost equal amounts) to cover the costs of everything. While the loans took us a couple of years to repay the memories they paid for are priceless.
If you can afford the repayments plus additional payments for early settlement then I say go for it. You will only regret not having had the wedding you both wanted. While I don't subscribe to the whole YOLO philosophy I do believe one still needs to be able to look back on one's life and feel you made the right choices, at the right time, for the right reasons.
You can apply for a revolving loan at your bank and of course you can shop around the banks for the best interest rate.
The only time a loan is ever acceptable is:
* if it is to get a car which you require to do a job or gain income if you really can't afford one and a bus won't suffice. A Hyunadai Atos is acceptable here, a BMW 320i is not a necessity and a waste of money and creates debt. If you can't afford the Atos you definitely can't afford the BMW
* To buy a house as it is basically impossible to finance this yourself.
Any other time is for crap you don't need and you should not be getting a loan for it. If you can't afford you do without!
The wedding you wanted or the debt you wind up living with?
1 day and (hopefully only) 5-10 years repayments or 3-5 years saving.
Weddings have just become a faux to try and impress people you more than likely don't like/haven't met/don't actually give a **** about you/you don't give a **** about and show off all the money you (don't actually) have.
Anybody that encourages you in any way to get a loan ever is an absolute clown and should not be trusted/listened to.