With all due respect to everyone who has posted, I agree that 35k is a ridiculous amount to spend for one day, however, that is my personal opinion. Many many people are spending this amount and a lot more, and if that is what she wants, its really not helpful to tell her to cut back on the day, particularly as I assume deposits are paid on everything and will be non refundable.
There is a web site called
www.primafinance.ie where you can compare the rates of most of the personal loan providers. Bear in mind, in terms of refinancing other loans with a personal loans, many have an upper limit of money you can borrow on unsecured lending. I would also be inclined to tell them that it is for your wedding as many people are borrowing for weddings and the bank will have a fair idea that you should be lodging a lump sum afterwards. Again, make sure to get a variable rate loan, otherwise you may not be able to make a partial redemption or may be penalised for doing so.
Your local credit union might be a good option if you are a member. You could arrange the loan for 35 (or whatever amount you end up looking for) and need only draw down the amounts you want at a time, i.e. if it amounts to less than you thought, you don't have to borrow the full amount. You can also then pay a lump sum off your borrowing without penalty.
Whatever you decide, I hope you have a great day and you are not in hock for it for too long!!