Ah, have you considered the Sudam models?
Less initial cost, simpler design without the powervalve and balance shaft. Also doesnt have the decomp valve, but perhaps heads (or valve) will be interchangeable.
It’s hard to know how longevity will work out between the DVS and a Sudam. One would assume the DVS will last longer between services with a rev limiter and balance shaft but until they get raced in full anger it’s hard to say.