This company was created because somebody that actually built a large could with Dell/Supermicro suffered years and years of pain.
If you do as you suggest you will have to do a whole lot more, at the minimum you need to set-up (and pay) VMWare.
Then you will need to figure out how you do automated firmware upgrades, low level monitoring and if security is a concern you likely want to configure secure booting with attestation and things like that.
Consider how much work it is to do what you suggest, vs buying this rack. And then consider how good (and repeatable) the end result is.
If you do as you suggest you will have to do a whole lot more, at the minimum you need to set-up (and pay) VMWare.
Then you will need to figure out how you do automated firmware upgrades, low level monitoring and if security is a concern you likely want to configure secure booting with attestation and things like that.
Consider how much work it is to do what you suggest, vs buying this rack. And then consider how good (and repeatable) the end result is.
That is at least the theory, see:
https://www.youtube.com/watch?v=vvZA9n3e5pc