I found that by leasing the van for 3 years, then purchasing it at the end you save on the interest if you had to loan the full purchase price.
i.e. Toyota hiace £169.00 pm 36 months = £6084
End of lease purchase £5000 + interest £1000
Total price ££12084
Toyota hiace £12000 + £2500 interest = £14500
You can buy cheaper & get low finance aswell, but, i personally prefer to have the lower ammount on finance.
I currently have 3 vans + i car. 1 van & the car are on lease. You need to shop around for the best deals all the time. i nearly brought the next van cheap with low finance & it was a very good deal, but, i needed to lose one of the other vehicles first, which i didnt do in time.
Hope this helps
Gary