You would be able to make the most of immediate benefits by outsourcing IT services through managed services. The foremost benefit would be that of controlling the IT costs. Outsourcing would be able to convert fixed IT costs into variable costs. It would also enable you to budget effectively. You would only be paying for what you used when you need it.
Yet another benefit would be that of reducing labor costs. Hiring and training of IT staff could be highly expensive. Moreover, temporary employees may not always live up to your expectations. Outsourcing would let you focus your human resources where you need them most.