other members drive an mg, i am sure they will share their experiences with you, including how the service is. i think the mg 4 x-power is a good choice and a real bargain for the price.
charging at home: how long do you plan to stay in the rented house? how much do you pay per kwh? if the electricity meter really needs to be replaced, it might also be necessary to replace the main power lines to the house ...
the granny charger with 3.5 kw might actually only charge at around 2.5 kw (?). if you plan to use this granny charger as your main charging option (which means long charging times), it's a good idea to have the plug, wiring, fuses, etc. checked by a professional ...
you can charge your mg at all public charging stations. there are some electric car owners who can't charge at home, so they regularly use dc fast chargers instead. there are many different providers, be aware the prices can vary ...
i also drive electric (and loving it), and at the moment, i charge my car only once a week ...