Agree with above.
One in a van should do £250 - £350 per day easy!! We have done more but only occasionally.
Two in a van should do £400 -£500 max!
Now supposing you are paying your employee £10 p/h and they work 8 hours per day as a one man in a van, the wage cost alone is £400
If they do the lower estimate of work of £250 per day the gross turnover is £1250, after all the extra costs involved in employing someone and extra vehicle you can make a tidy amount over the month, but in our experience one person can do nearer the £300 mark with a few days a week doing more than this!! The work HAS to be right, compact with little driving and not too big a job as it can slow down with too much hose pulling, van moving gate climbing etc etc
But you need contingency with employing and you MUST make sure they are pulling their weight otherwise it wont work.