The "rental sister" idea is perfect. However, the problem seems to be one that will self-correct in time because if as many young men are shutting themselves in as is indicated in the article, there will be no one for the young women in a few years and something will have to change. All the young women leave, or men from other countries come in (which I don't think would be allowed), or the young women will seek company with other young women and sperm banks will become all the rage.

Anyway, I don't think it is ever too late for anyone to do anything.