It sounds to me through the discussion then, perhaps the best and most cost effective means would be to work it up at home, get it to where you think it is very good, then have it mastered and tweeked at a professional studio. You would then have the best you can without the endless hourly studio charges. Am I wrong in my thinking? There are so many good songwriters that just don't have the money for the hourly studio charge. Wouldn't this approach be the best perhaps or are their drawbacks to it