When you have to buy the servers the first and the foremost thing that would strike your mind is to buy the most powerful ones which would in turn increase the allocation of budget for the infrastructure. On top of that you should hire the resources who could make sure that the servers are up and running without having to cause any sudden issues for the people working on them or cause any downtime for the APIs that are running on them. While you could not stop using the APIs since they provide you lot of power with the features that could be customized further depending on the need each end user has with the APIs.
So, now that you agree that the servers on which APIs are hosted and are following the strict protocol of sending and receiving the information, then you should always try the RESTful HTML to PDF API that would run better on the servers that you are not responsible for, you do not spend to buy them and finally you do not hold any sort of ownership but yet are assured of their uptime. Having said this, it is wise that you go with the most powerful infrastructure that is already set up than to work from scratch.
However, though you have access to the infrastructure, you should at least have the complete awareness of how the APIs could help solve the issues that you have in your current projects and how the upcoming projects could be delivered on time with an increased performance. So, start learning how to configure the APIs so that the customization facility could be optimally utilized for the benefit of your business or organization. Instructions would be pretty clear that you do not have to worry about hiring experts to leverage the power of APIs.