Never thought of using kite with skateboard, but this year I got hooked on carving boards. I tried Carver and then I did my own build, which is better than Carver, but also got more expensive..
This board feels like a surfboard on the street and you can pump it from 0 km/h to 16 km/h. You can sustain effortlessly 12-13kmh speed with good 80mm wheels
So basically you need:
- a deck (I got 32" 9t6t from longboarding.de - very nice value) that you maybe already have
- surf-skate trucks like carver CX7 or you can just buy waterbourne surf adapter with a back rail adapter (give more high speed stability and levels out the board so its same height) that will convert any trucks to surfskate. Pretty much doesnt matter what front truck you have, but better get some classical pumping truck like Benett or RTS.
- 78-80A wheels.
If you have some sort of cruiserboard or any longboard already, you can convert it for like 100$.