Keeping it topped up using a standard plug and paying for the use of a fast charger when needed could work. There's just the small matter of the fact that a new Ioniq 5 is about £45K. I'm aware that there are probably smaller cars that are cheaper, but I'm currently driving a 3 series Touring and don't want to go much smaller.
There don't seem to be as many options for second-hand EVs except for the nearly-new ones that are still north of £30K.