New business (pulled pork burger van)

[KelGrim]

Me and my husband are thinking about buying a food trailer, I'm interested in knowing how much it will cost to get it set up minus the trailer and stock. So what I am really asking how much approximately is it for things like: street trading consent, has checks, pat test, insurance, checks for trailer, food hygiene course and so on. Any help welcome..
Do you need a street training consent to trade at car boots and in business car parks??