Use floor plans for houses, use plans for tables… think outside the box here … i cant raw for ****… and mst of mine has been from pictures with scale on them… or just guesstimate using the basis of the UE4 charcater avg (84x84x192?) if im not mistaken everything else kinda comes to play…
As for Very detailed work, twists, sculpture style… i honestly find free stuff and add it to existing structures, and if not i make time to find a turtorial on it and learn just that Feature… ie i went and learnt to do cables (wires etc) in 3dsmax one year and well thats helped for years for many other things… hair, grass, fingers LOL…
hope you get into it… i was skeptical but now im neck deep in learning this UE4 engine and its pipelines =)…