Motorisation of a supfoil take-off aid

I’m considering a light start-up aid configuration of a foil drive sup foil.
I already have the board and several Gong foils (Curve M, L, XL and Veloce L)
For the moment my choice is
Flipsky 65111 engine
Eskate remote control in a waterproof balloon
Pelican type waterproof box fixed at the back of the board
4 Parkside screwdriver batteries (20 V, 4 Ah) 2 x 2 for a 40 V, 8 A.h power supply
The cost is +/- 600 Euros
I’m not looking to make an Efoil that can be used for long periods of time, but I just want to have an aid to take off and then surf the swell.
I read on the forum that the 65111 motor is not recommended because the power cables are at the propeller shaft. How is this inconvenient?
What do you think of this configuration?
Hope to see you on a spot in the Var in Kitefoil, wingfoil, Supfoil and soon Efoil
Thanks for your help.