I just got Maui'd a few weeks ago and I was able to do the whole wedding day including the reception for 23 people for under $4000.
I used Deanne from Precious Maui Weddings. I paid $1500 for my package and that included, the minster, photographer with 36 printed photos, my bouquet, my MOH bouquet, 2 bouteniers, 2 lei's, in room hair and make up for me and my MOH. We got married in Kula Botanical Gardens and had to pay for everyone's admission as well as chairs and set up and that was included in the package rate as well.
We paid an additional $300 to Marbelle Photography for the digital negatives and the rights to print them. She took over 240 pictures.
Our reception was at Ruth's Chris Steakhouse in Lahaina and for 23 people the bill for the food was $1800. We paid for drinks as well and that came to around $400.
So I definatley think you can do it for under $7000.