I realize this post is from ten years ago, but I'm sure many are still asking these questions, so I will answer them.
1. Transitioning from Autocad to Revit does require redrawing your project. However, notes, blocks and details can be inserted as .dwgs into Revit without redrawing them.
2.Collaborating with outside designers, engineers and others. Many now use Revit, and any Revit drawing can be exported as a dwg for use by someone else.
3. Finding / Training Revit operators. Can be hard to find, but getting less so every day. Learning curve is rather steep, so I would suggest paying for training.
I've been using Revit since 2003 exclusively for residential design and have helped three different homebuilders in the last three years transition from Autocad to Revit. (and yes, they are still using it!)
Thanks
We are investigating the use of Revit (again) to do material take-offs / Quantity Take-offs in the Production Home Building arena... Specifically... has anyone heard of a successful implementation with regards to Sales Options... these are not design options but structural options such as additional rooms - adding SF to footprint.... multiple elevations that change the roof structure... options that change the foundation... etc. We need the ability to create material take-offs specific to the options and how those options add or subtract from the base house. Also... is there a way to swap-out data bases that would allow us to quickly alter a take-off based on geographic locations... for instance one location may use engineered wood beams while another uses steel. Or one area requires 10" foundation walls and another 8" while the rest of the house remains the same. We also have some areas where the structure actually changes because of the orientation of the structure...ie. leeward vs. windward side of a body of water.