Perspective 12 ETF Portfolio - Too many?

I very much prefer your way of getting the diversification, and having the pearler buying rules do dollar cost averaging into stocks when ‘cheap’.
I’m wondering why you want both hedged and unhedged IVV. Personally I don’t see the point in having an additional cost factor to play the foreign exchange zero sum game, but that is just me.
I also may question the value of having cash in there when you are accumulating, certainly if you are doing drawdown as it gives some protection against having to sell shares when market is oversold. (And in that case assuming 4% as ‘safe’ withdrawl rate, 2 years of safety would be an 8% weight which you top up in good years and draw down in back market years.

Starting an aggressive investment portfolio with a focus on specific sectors like Tech and Healthcare can be a strategic way to capitalize on growth opportunities, especially with a 10-15 year investment horizon. Your approach to diversify across different ETFs and geographic regions, while maintaining control over the allocation, is a sound strategy. However, managing a portfolio with 12 different ETFs can be complex and may lead to higher transaction costs and more time spent on portfolio rebalancing.

Considerations for Managing Multiple ETFs:

1. Overlap and Correlation: With multiple ETFs, especially those targeting similar sectors or regions, there’s a risk of overlap. For instance, both the iShares S&P 500 ETF (IVV) and the iShares S&P 500 Currency Hedged ETF (IHVV) target US companies, which might lead to an over-concentration in the US market. It’s crucial to analyze the holdings of each ETF to ensure they provide the diversification you seek.

2. Rebalancing: Managing a larger number of ETFs requires regular rebalancing to maintain your desired asset allocation. This can be time-consuming and might incur additional transaction fees, which can impact your overall returns.

3. Cost Efficiency: More ETFs mean potentially higher total expense ratios (TER) and brokerage fees. It’s important to consider the cost implications of maintaining multiple ETFs in your portfolio.

Alternative Strategies:

1. Consolidation: Consider whether some ETFs can be consolidated to reduce overlap. For example, choosing either IVV or IHVV depending on your view about currency risk, rather than holding both.

2. Core and Satellite Approach: You’re already applying this strategy, but you might streamline it further. For instance, increasing the allocation to core holdings and reducing the number of satellite posi

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