Just daydreaming.....The biggest "normal luggage" cases that you can buy and still fit in a car boot, check in and have wheels is about 86cm x 40cm x35cm. Want to do TT or foiling 10-30Knots, be under 25Kg using "normal luggage"

10m and 15m foil kite (Flysurfer Speeds)
1 bar (pref carbon for weight)
138x44 Split twin-tip (either Flysplit or Nobile split, pref carbon for weight)
strengthening/foil adaptor plate (to be designed and manufactured)
zeeko 90cm mast just fits diagonally.
harness/wettie

No pump required
<20Kg of kite kit
Room for clothes as well
10m on TT for up to 30Kn
15m on foil/carver wing from 10Kn
15m on TT for shallow spots in 12Kn+

So - got to find a splitty and work out how to fit adaptor for foil. and also a 10m foil kite (pref FS speed)

Have taken "golf" bags etc in the past and they are fine but make getting about tricky sometimes