There’s also the question of money. Installing a EVSE device to ensure no-one overloads the power supply will cost money. And there’ll probably be a periodic licence fee for the software in it and perhaps for occasional updates.
Lastly, are you sure the other 8 units will be happy to pay for your electricity while continuing to buy their own petrol? If they aren’t perhaps you’ll also need an EFTPOS device wired in.