This one has been churning in my head for quite some time now, how can I putt this into words so it will last more than a year and not become outdated?
Well, first off I will strongly recommend a stationery computer and not a laptop. Nothing wrong with a laptop, but to be good enough (read, powerful enough), they need to be expensive, so I would rather recommend getting an “okay” priced and light weight laptop that you can bring with you on the travels and then get a powerful stationary workstation at home. Assembling a stationary computer is a lot easier than it might look like.