I really didn't get the Hackintosh/Chromebook comparison. I mean 120 dollars to try out a "PC" seems fairly reasonable. Otherwise try out the one of a colleague or a friend? Most new products that you try out (also without really knowing if it's good or not) will cost more than that, i.e. smartWATCHES that start at the same price (or are even more expensive).
And you could use that old 5 year old laptop, but would it work better than a $120 Chromebook? Plus, couldn't you just bring back the device if you really didn't like it? Here in The Netherlands you'd probably have at least a month to bring it all back more, probably longer.
My biggest problem with Chromebooks: a good Android tablet with a (attachable) bluetooth keyboard seems like a better option. It can do pretty much the same thing, you have access to the Play Store with all those great apps, it has offline mode in Google Apps, etc. Why would I prefer the Chromebook?