The hardest part of all this is "biting the bullet" and taking the hit on wages, insurance, etc. If you have a good database of work and are constantly booked up more than two weeks in advance then I would say it's time to take on a helper or even look at setting up a second van. There may be lean spells but if you've done your homework right and have a good reputation then the work will steadily come in and you'll be able to take on bigger jobs at short notice.
We did two jobs for a school and a child care place at short notice over the weekend that I would never have been able to do if I was working on my own.
My job now is mainly running the diary, pricing jobs, raising invoices, counting money and ensuring we have the gear to whatever it is our customers require. Today I will be busy sorting out gear and chemicals for cleaning an oily floor at a disused commercial garage workshop that we are doing next monday.
If you have the work, take someone off the dole and help the country get back on it's feet!!