Complete studio service with design, manufacture, build and test has benefits
When building a studio, the benefits of a team with lots of experience is obvious. They know about what you want to do in there and the practicalities of layout, connectivity, gear etc.
However, there is a big benefit to having the design, manufacture, supply and build (and sometimes test) all done by the one team. It means you get plans that specify components that are readily available and can be bought or made. We see too many reports that say things like ‘use a suitable attenuator here’ or similar statements. All of the items like isolators, plasterboard etc, are known to work together and have methods for installation and finishing. Provision for fresh air, wiring, access, etc, are all taken care of as they have been done so many times before. The up front cost is easily saved by avoiding missed items, things that aren’t easy to source or implement or actual failure of the outcome.