Many posters on here struggle with round capacity after 10, 15, 20 years.
Think about brand awareness. They get the leaflet, then they say, oh yes i've seen him about, but for that to happen effectively you need the sign written van. £20,000 or not, that's how it works.
Forget the one job you can directly attribute to the van, I bet nearly everyone you speak to says they've seen you about. You have instant credibility and are trusted.