Private chain utilization - is Stark to heavy weight TPS limiting? Need high TPS

Greetings, I am investigating potential of using Neptune for a high TPS private commercial system and utilizing a security mechanism that could wrap the rust code so wondering if there would be a possibility to replace Stark with Snark to eliminate the high computational cost of Stark/mining.

I understand the security aspect of proof of work but for a private coin that is not really important.

I am very enthusiastic about Neptune and hope there is a way to navigate this. It is possible we could allow our private coin to be used to purchase Neptune for partial funds left over for instance or other scenarios.

In the whitepaper it mentions needing 50 cores and lots of memory for one of the proofs could this security mechanism be foregone given we have security encasing the entire private coin otherwise.

Best regards from the U.S.