Can I bring in an IT manager in just a few hours?
This is a question that has two answers. Is it possible to bring in an IT manager at short notice? Yes, but it is more difficult to get the right expertise at short notice. It is best to spend some time planning an external resource. This usually gives a better result.
Is it possible to bring in external help for a very short period such as a few hours? Yes, it is possible, but think about what you want to get out of the person. If you are only interested in general advice, an hour is fine. If you want help tailored to your needs, the resource also needs time to understand the situation.