This is correct
Definitely not Freetrade. You can see their pricing structure here.
Whilst DRIP is not yet a benefit Freetrade offers, you can still manually reinvest for free. Once DRIPs are available, then you could avoid doing it manually.
Another big advantage of Freetrade over Vanguard is that you can invest in any other funds and shares if you would like at some point. Whilst I understand you go fully for S&P 500, it is always better to have an option to go for a variety of funds or even individual shares if you will one day wish so 