Depending on the public charging infrastructure in your area, it is already quite feasible to own an electric car without your own wall box. Modern BEVs can charge basically to full within 20 minutes. If your supermarket has a public charger and your driving and shopping cycles are matching (or can be aligned depending on your daily driving distance), you can simply plug in while you shop for your groceries.

Also, you can check if there is someone else on your street who has a charger and who might be willing to let you charge in exchange for a little surcharge on the electricity you consume.