Thank you for the write-up! One correction I would make is that per [1] VTSAX does have a $3,000 investment minimum. Before, VTSMX used to have the $3,000 minimum and VTSAX $10,000. However, it looks like recently they've gotten rid of the VTSMX share class entirely and dropped the investment minimum of the VTSAX share class to $3,000.
[1] https://investor.vanguard.com/mutual-funds/profile/VTSAX