We did an Intimate Wedding at the Wedding Pavilion last year for right around $6,000, but that included everything, such as the chapel, the minister, limo, photography, videography, cake, champagne, even our dinner afterwards. I am not sure of the current pricing, but with the intimate packages almost everything is included, so even with the add-ons that we had it was still $6,000 total. It was amazing actually. They did everything for us, nothing was left to chance and everyone there is so professional and helpful. I thought it was pretty reasonable for the quality of everything we got, because we also had a bigger reception at home and it cost far more than our Disney Wedding/reception, and we had to do so much work for it and it still wasn't as nice. Check out the wedding boards and their wedding website for all the details. I guess I can't really describe what a wonderful and unique experience it was to get married at Disney and I think a vow renewal there would be just as special. If it fits into your budget, you do get a really great value for everything and it is amazing, so I would definately do it all over again. I have been to a few weddings since ours, and they just don't compare and these were much more expensive weddings. I mean 10x more expensive. ( I know am I biased, but..) I don't know much about the cost of vow renewals, but weddings generally cost quite a bit more than $4,000. If you can get away with that, I say go for it. That's a steal.
And just a hint to all you "romantic" guys out there, girls don't want facts and figures when it comes to romance and love, they want the fairytale, and Disney is the perfect place for that.