Which is the etf you will recommend if I would like to lump sum $5000 now, and dca $500-$1000 range every month moving forward?

You can pick gold/ commodities - EFTs RSP or lump sum in FSM one

Vanguard total world ETF (VT) is a good option, a simple way to own equities all around the world. If you prefer Ireland Domiciled ETF listed on the London stock exchange, choose VWRA. Do note that Brokerage fees for the US exchange are way lower. There are also way more brokers in SG offering the US stock market.

For S&P500, Ireland domiciled is much better, others just stick to US

The estate tax for US, its not that scary anyway, as long as someone know your username/password before you pass away~ because theres no way for US to track it, less than 1000 people reported it for past 3 years 🌚

Yes I agree with Fred and Samson. Fred gave a detailed explanation on why Singaporeans should only invest in UCITS ETF.