I have 3 months Chinese visa and double entry HK entry permit in my passport

buy I don't want to go there this year, I postponed my trip because I am waiting for my brother container to land the ending of this month. My two entry permits will be expiring the 18th of this month. I have 3 questions: 1. Can I apply for new entry permit and be granted 6 months one for both countries even I didn't travel to the two countries?
2. My plan is to get the 6 months entry permit and live and work permanently in HK, can this happen?
3. Can I work in HK as a waiter and make good money?