You don�t need a laptop or computer to write presentations � unless the course is teaching you to use a presentations package. You say you �may� need to write presentations, so you are intending buying a laptop and software for something you only �may� need to do. And how many presentations � one a week? That�s only six, which works out at about �100 a time if you have to buy the hardware
Go to an office supplies shop and buy a pack of overhead transparency paper and a set of coloured pens.
Any presentation you need to do can be hand written on the transparencies and projected using an Overhead Projector (OHP) � which any residential training centre place will have. Your audience will be delighted not to have to face �death by PowerPoint� yet again.
If you need to show diagrams you can photocopy them onto the transparencies.
And if by some remote chance there isn�t an OHP, do the presentation on paper, photocopy it and give them as handouts.
Management gave presentations before computers � all that happened since is that more time is spent on making jazzy PowerPoint shows than actually communicating information.
If you can�t get the message over with handwritten bullet points and diagrams, then either you don�t understand what the message is or its not worth getting over.