If you'll take some advice from someone who takes all his drawings from others -especially Gollevainen Hood and Krakatoa on here - the most useful source drawings are those which show what is inside the ship. It sounds obvious that the funnels are over the boilers, but knowing the internal layout helps confidence no end. Also for what is below the waterline, most photos don't help at all.
You asked " Is Friedman always right?" The answer is usually, but not always. For example, his book on British Cruisers tells you the WWI HMS Birmingham had four screws. She had two.
(I 'pay my way' to the real artists with information, usually on British ships, sometimes others.)
I know books look expensive, even second hand, but if you keep looking (use
http://www.bookfinder.com/) you can pick up bargains, and your collection soon grows, because they don't wear out if you treat them well.
eg for Farragut
http://www.bookfinder.com/search/?ac=sl ... 520history