Its not hard to run it as a downloadable PDF, that bit is a cinch, but they would need either a decent host with plenty of resources or to host it externally, as with 7,000 odd plus members hitting the download button on a many page full colour PDF within basically 72 hours of each other once per month...thats some serious download capability... not within the realms of a normal host account...but certainly attainable at a reasonable cost.
I agree it should simply be a PDF link on the website and on the Facebook page. An external app should be optional.