The idea is good. It is using a bit what I proposed on this thread and making in one ETF
In fact, you can do that yourself with 3 ETFs:
- Invesco MSCI USA UCITS ETF Acc (synthetic ETF for the US), TER 0.05%
- Xtrackers MSCI World ex USA UCITS ETF 1C (Physical ETF for Ex-US), TER 0.15%
- iShares Core MSCI Emerging Markets IMI UCITS ETF, (Physical for Emerging market), TER 0.18%.
The cost with this combination is around 0.09%, but you need to rebalance