"Man With a Van" Services
Without trying to be sexist, 'man with a van' is a well-known phrase. It advertises the availability of a person with their van to do a mix of random jobs that people need completing who don't have access to a van.
The difference between this and the other money-making ideas on this list is that it isn't specific or specialised. It could be delivering a sofa bought on eBay or dropping off some rubbish at the tip. If it fits in your van, you can take the job.