Freelance workers allow YOU to focus on more profitable activities
Letting your business grow from small to medium sized is a big step. You will need more of everything, including personnel, which will drive up your fixed costs considerably. With an income of that medium sized business it should be alright, but you are not there yet. You are in the growth stage and unless you have enough cash to cover the costs over this period, your only option is to keep personnel costs variable by hiring freelancers to do the work.