Your greatest assets are your employees. They’re also your greatest cost.
You also pay 13.8% National Insurance on everything you pay them over the NI threshold and your employees pay tax of 20% and National Insurance of 12%. To save costs you could do either of two things.
Try to employ part time workers and if you pay them less £150 a week they don’t pay any tax or N.Insurance and you don’t pay any Employers National Insurance.
The second thing you can do is to subcontract your work to people who are themselves Self Employed but be careful with this as HMRC might argue that the person is not really self-employed.