Two major factors of endangerment

In my opinion, there are two major ways in which Irabu Ryukyuan (and other Ryukyuan languages) is seriously endangered:

    1) Speakers are all elders, and younger         generations do not speak Irabu         Ryukyuan anymore.

    2) There is no reference  grammar which         thoroughly describes Irabu         Ryukyuan, from its phonology         to discourse.

Were there a good reference grammar available for Irabu Ryukyuan and therefore the only problem were 1), then it would be that archiving is the next thing to do as the priority.

However, given that it is necessary to solve 1) and 2) at the same time, and that urgently (within 10 or so years before it is completely impossible to get consultants or data or whatsover), it is very important to set up such a way  in which both sides of description and archiving are swiftly secured.