There’s always the VW Caddy California which would be sub £30K to Motability… https://www.autoexpress.co.uk/vans/352898/new-2022-volkswagen-caddy-california-sale-now-ps30720
I’d want one with a loo shower and built in kitchen, along with a seperate bedroom with built in king size bed. With a maximum AP of £2k 😉