Personally I will not go to Maui to kite. There are MANY other places that suit me better.
If it is a once in a lifetime pilgrimage then go, you may love it. But only if you like kiting in 20kt plus conditions.
And speaking of wind strength, Maui is weird, 20kts is like 30kts (I'm no guru but I've been sailing one craft or another for 30 years). It is a known phenomena, something about the wind being unaffected but mechanical interference for thousands of miles (source is "Windsurfing Magazine") and being more FULL but at the same velocity (go figure). Finally, there is the chop...choppy, choppy choppy!
I'm sure that Maui could turn on some SUPERB kiting days for mid level kiters (waves and wind and smooth water), but I didn't see it.
Bear in mind I am older now and less radical than I used to be.
$18/day for accommodation is a BARGAIN! The only better deal I know of is Banana Bungalow $250USD for a month in a dormitory with 4-6 others. Personally, I didn't like it there. It also assumes that they will treat a kiter like a windsurfer.