Been doing scanning and OCR work since the late 80s. The technology has gotten very good. I have a fairly old scanner (HP-ScanJet IIcx) built like a tank . . . and I have been constantly upgrading my OCR software. I started with OmniPage Pro version 3 from Caere . . . they since sold to ScanSoft and are now up to version 11. It is simply outstanding. Today I can scan any document quickly and accurately with almost no correction needed. It will scan into any word processor or, as a straight ASCII text file (my preference) that can be opened in any word processor. Today you can buy a decent scanner and it comes bundled with a lite version of OmniPage or some other one . . . Xerox's was good, (Textbridge) but that too got sold.
Your 20 pages would be less than an hours work to scan and edit and finalize in Word, WordPerfect, or . . .? Then it could be printed as a PDF file and be even more electronically transportable.
If you have any academic institution links or friends, the academic version of OPP 11 would definitely be a worthwhile investment. It's accuracy is awesome. And I can remember days when typing the whole page was about as fast as scanning and editing the OCR output. 🙂 Those days are now gone.