I am curious as to how that matters as to which resort?
A previous poster askeds, so I responded. They could walk to MK, but otherwise would be using the buses or monorail to get everywhere else anyway.

And honestly, if a group of teens cannot navigate the WDW bus system there is a big problem.
I am sure they could manage the bus system. I own at BLT, so that is where the offer is for.
From your last statement, I assume they are also providing their own park tickets and food at WDW?
Yes
How about activities at the other locations? Who is paying for those?
Activities at the other locations are included.What kind of budget do they need for that on top of the prices you are saying here?
Does that cruise price include their tips?
YesANY shore excursions are money for on their own things in ports?
Yes, that's included in spending money
I really think you need a realistic idea of what the TOTAL cost for each kid will be before you have them choose and/or talk to parents.
I have travelled to these places multiple times I know what it costs.
I'll go back to what I said before. I would not finance it. If I had that much extra left after all the other Senior year stuff, and before college, I would put it towards one last nice family vacation--because I am selfish and would want that. We would likely gift our child one to two hundred towards a trip like this if they were going with friends, but that is really the most.