If your budget is that low, perhaps you just want to use wget. If you use a fairly recent version of wget (1.14 or newer), you can even produce a WARC file, whi

If your budget is that low, perhaps you just want to use wget. If you use a fairly recent version of wget (1.14 or newer), you can even produce a WARC file, which is great for archiving. (It captures your requests as well as the responses, with full headers).