Entire family vacation

I have this dream id like to make reality within the next few years.....I want to take my family on a group vacation.... I was thinking something along the lines of a Disney cruise out of Florida, but open to all suggestions.... Where talking eight adults and seven children who now range in age from ten to sixteen.....
I was thinking thirty grand easy..... Maybe id just ask everyone to pay air fare to Florida and I would pick up the price of the cruise..... One of my adult children who is very successful has taken my wife and I on spectacular vacations and doesn't need my financial help, the other adult child doesn't need help either, but thats not the point.
My third as well as my beloved cousin are ok but couldn't really afford this
I want them all there
This is something I want to do soon.....We dont know what Gods plan is for us and seeing that my wife and I are closing in on seventy very fast, to fast LOL, plus the fact that she has fought Stage four cancer now eleven years, I think its time
Sure id like to take that money and buy the classic car I always wanted or another project and this time do it right but the trip with all the kids, grandkids and cousin and her family, man id like that....Id order all those tee shirts with my last name on it, the kids are free to do what they want while they are on vacation, with only one request that we eat dinner all together.
Thoughts? and has anyone done anything like this......Thanks.