There is an interesting article about to come on Kitesurfing.com.au about 'some guy'

who just got into Foilboarding. All the purchasing experience and research done on several manufacturers and brands. The article is from one person's experience only so take it with a grain of salt.
In regards to learning.. read it

, it's almost like you've never kited before, hundreds of crashes and yes lots of bruises. So take it as a challenge because when you get it the feeling in awesome. It is possibly not for the 'purists', rather the early-adopters.
Regarding cost: think of it as the price of a brand new kite - it is a new sport, right?
Regarding what is possible? watch this
now add a kite for propulsion and forget about the jetski
Have fun (crashing..)