Once you have solved the battery transportation (ok by boat but not allowed in planes), you could try :
Depending on which European Mediterranean language you speak or favour (Spanish, Italian, French, …) I don’t think in 2019 (maybe 2020 ?) there would be a problem playing with an efoil in the sea providing you are within 6HP or around 5000W. You just can’t do that in swimmers area. OK in sea scooters/windsurf area.