After having few thoughts on this topic, I am coming back with some more questions:
1. If I would get a PR and decide to leave at some point, would keeping company and employment here (so paying taxes and CPF) "guarantee" myself REP extension every 5 years, considering I would not live here?
2. Being PR, would I be able to be the only director for Pte Ltd, even if I would have an overseas address? I know that for EP director it is required to have a residential address in SG, but how does it work for PR?
3. I read that CPF consist of 3 accounts and that 36% gets locked each month (20% employee; 16% employer) up to maximum S$1800. Upon PR resignation, do I get 100% contributions back?