Although it may seem less expensive each month to only call your technology company when you have a problem, over the long term this is most certainly not the case. Doing so can increase your IT support costs exponentially because small problems can quickly grow and cause catastrophic effects across your network resulting in large IT support and repair costs.
These unexpected costs will also likely come at the worst time possible because that’s just the way it goes. Having smaller regular maintenance payments you expect and budget for is a much better plan for all.