Hi, Norman! That’s an impressive and comprehensive list. Where we can help in this forum is especially for small studios with relatively few resources. Using freeware such as REW (REW is actually donationware and I urge people to contribute to its developer) — it’s possible to at least diagnose a number of acoustical problems that Norman has outlined. The correction of those problems may require acoustical experts such as Norman, but at least you will know where you stand.
As far as electrical — if anyone has questions about the electrical design issues in a studio, we should either make a new forum or find a place in one of our existing forums to answer electrical design questions.