Depends how you look at it really.
About £10,000 when I first switched to WFP with van and WFP equipment.
Now I usually spend about £6,000-£8,000 a year on expenses. (Fuel, new equipment etc.)
I should really curb my spending on new stuff as I do feel my costs are a bit high for a sole trader. I'm nearly there now though with my optimal set up, and then after that the plan is just to maintain and replace. So that should help.

that's the plan anyway. Lol